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    Student in wheelchair beside furnace fuel flow controls in HVAC classroom — Stock Photo
    Student in wheelchair beside furnace fuel flow controls in HVAC classroom
    Side view male astronaut in spacesuit browsing data on netbook while standing outside station with rocket shaped antennas — Stock Photo
    Side view male astronaut in spacesuit browsing data on netbook while standing outside station with rocket shaped antennas
    Young man reading a book in library — Stock Photo
    Young man reading a book in library
    Hispanic carpenters studying their work on framing at a house under construction — Stock Photo
    Hispanic carpenters studying their work on framing at a house under construction
    Carpenters using circular saw at a construction site — Stock Photo
    Carpenters using circular saw at a construction site
    Carpenter nailing on wood framing at a construction site — Stock Photo
    Carpenter nailing on wood framing at a construction site
    Female scientist working in laboratory with digital tablet. — Stock Photo
    Female scientist working in laboratory with digital tablet.
    Transplacental transmission of HIV infecting 8 week human embryo, conceptual illustration. — Stock Photo
    Transplacental transmission of HIV infecting 8 week human embryo, conceptual illustration.
    Delighted female cosmonaut in spacesuit holding helmet in hands and standing in snowy woodland while looking at camera — Stock Photo
    Delighted female cosmonaut in spacesuit holding helmet in hands and standing in snowy woodland while looking at camera
    Female scientist holding petri dish with hazardous biological cultures. — Stock Photo
    Female scientist holding petri dish with hazardous biological cultures.
    View from height of modern city infrastructure with towers of skyscrapers under blue dusk sky, Canada — Stock Photo
    View from height of modern city infrastructure with towers of skyscrapers under blue dusk sky, Canada
    Modern Architecture of Shanghai Oriental Sports Center, China — Stock Photo
    Modern Architecture of Shanghai Oriental Sports Center, China
    Scientists discussing over lab equipment in laboratory — Stock Photo
    Scientists discussing over lab equipment in laboratory
    Human fetus developing at week 25, computer illustration. — Stock Photo
    Human fetus developing at week 25, computer illustration.
    Carpenter marking wood at a building construction site — Stock Photo
    Carpenter marking wood at a building construction site
    Buddhist prayer wheels at a temple in Kathmandu, Nepal. — Stock Photo
    Buddhist prayer wheels at a temple in Kathmandu, Nepal.
    Side view of cropped unrecognizable female standing with eco friendly textile bag in summer park — Stock Photo
    Side view of cropped unrecognizable female standing with eco friendly textile bag in summer park
    Young male designer examining prototype and notes in workshop — Stock Photo
    Young male designer examining prototype and notes in workshop
    Group of multi ethnic kids sitting on their desk in the classroom at school. Primary education social distancing health safety during Covid19 Coronavirus pandemic. — Stock Photo
    Group of multi ethnic kids sitting on their desk in the classroom at school. Primary education social distancing health safety during Covid19 Coronavirus pandemic.
    Carpenter using a circular saw on studs — Stock Photo
    Carpenter using a circular saw on studs
    Welder repairing vessel part in workshop — Stock Photo
    Welder repairing vessel part in workshop
    Side view spacesuit standing on rocky ground against metal fence and striped rocket shaped antennas on sunny day — Stock Photo
    Side view spacesuit standing on rocky ground against metal fence and striped rocket shaped antennas on sunny day
    Carpenter using a circular saw, cropped image — Stock Photo
    Carpenter using a circular saw, cropped image
    Building site in a parisian suburb — Stock Photo
    Building site in a parisian suburb
    Student in wheelchair examining furnace ignitor in HVAC classroom — Stock Photo
    Student in wheelchair examining furnace ignitor in HVAC classroom
    Realistic human fetus at week 40, computer illustration. — Stock Photo
    Realistic human fetus at week 40, computer illustration.
    Illustration of red human embryo on black background at pregnancy stage of week 39. — Stock Photo
    Illustration of red human embryo on black background at pregnancy stage of week 39.
    Animal cell during cytokinesis (cell division), illustration. — Stock Photo
    Animal cell during cytokinesis (cell division), illustration.
    Focused young female astronaut in spacesuit and helmet looking at camera and standing in snowy woodland — Stock Photo
    Focused young female astronaut in spacesuit and helmet looking at camera and standing in snowy woodland
    Human fetus developing at week 9, computer illustration. — Stock Photo
    Human fetus developing at week 9, computer illustration.
    Physical therapist performing skinfold test to measuring teenage boy body fat. — Stock Photo
    Physical therapist performing skinfold test to measuring teenage boy body fat.
    Carpenters lifting a laminated beam at a construction site — Stock Photo
    Carpenters lifting a laminated beam at a construction site
    Human fetus at week 37, computer illustration. — Stock Photo
    Human fetus at week 37, computer illustration.
    Carpenter making bevel cut using a circular saw — Stock Photo
    Carpenter making bevel cut using a circular saw
    Molecules of thyroid hormones triiodothyronine T3 and thyroxine T4 in human body, digital illustration. — Stock Photo
    Molecules of thyroid hormones triiodothyronine T3 and thyroxine T4 in human body, digital illustration.
    Magnified digital illustration of 2 cell stage embryo. — Stock Photo
    Magnified digital illustration of 2 cell stage embryo.
    Portrait of a mixed race girl sitting at desks wearing face mask in classroom, looking at camera. Primary education social distancing health safety during Covid19 Coronavirus pandemic. — Stock Photo
    Portrait of a mixed race girl sitting at desks wearing face mask in classroom, looking at camera. Primary education social distancing health safety during Covid19 Coronavirus pandemic.
    Amazing landscape and wind turbines at Bashang, Hebei, China — Stock Photo
    Amazing landscape and wind turbines at Bashang, Hebei, China
    Carpenters working at a building construction site — Stock Photo
    Carpenters working at a building construction site
    Low section of boy maintaining social distancing at school. Primary education social distancing health safety during Covid19 Coronavirus pandemic. — Stock Photo
    Low section of boy maintaining social distancing at school. Primary education social distancing health safety during Covid19 Coronavirus pandemic.
    Developing pig eye — Stock Photo
    Developing pig eye
    Carpenter lifting wooden frame at a construction site — Stock Photo
    Carpenter lifting wooden frame at a construction site
    Urban scene of illuminated cityscape in night — Stock Photo
    Urban scene of illuminated cityscape in night
    New home construction in a neighborhood, Langley, British Columbia, Canada — Stock Photo
    New home construction in a neighborhood, Langley, British Columbia, Canada
    Illustration of red human embryo on black background at pregnancy stage of week 10. — Stock Photo
    Illustration of red human embryo on black background at pregnancy stage of week 10.
    Business people examining blueprints in office — Stock Photo
    Business people examining blueprints in office
    Side view of female cosmonaut in spacesuit holding helmet in hands and standing in snowy woodland while looking away — Stock Photo
    Side view of female cosmonaut in spacesuit holding helmet in hands and standing in snowy woodland while looking away
    Happy young mother and adorable smiling baby watching funny video on mobile phone while sitting on cozy sofa at home — Stock Photo
    Happy young mother and adorable smiling baby watching funny video on mobile phone while sitting on cozy sofa at home
    Rear view of engineer talking on the phone at the construction site — Stock Photo
    Rear view of engineer talking on the phone at the construction site
    Human fetus at week 27, computer illustration. — Stock Photo
    Human fetus at week 27, computer illustration.
    Snowy landscape with residential buildings — Stock Photo
    Snowy landscape with residential buildings
    Workers overseeing digger and truck in quarry — Stock Photo
    Workers overseeing digger and truck in quarry
    Human fetus developing at week 7, computer illustration. — Stock Photo
    Human fetus developing at week 7, computer illustration.
    View from height of modern city infrastructure with towers of skyscrapers under blue dusk sky, Canada — Stock Photo
    View from height of modern city infrastructure with towers of skyscrapers under blue dusk sky, Canada
    Blurred view of truck in quarry — Stock Photo
    Blurred view of truck in quarry
    Pills in Petri dishes on gray background. — Stock Photo
    Pills in Petri dishes on gray background.
    High angle close up of female athlete practicing at a sports stadium, in position on starting blocks, preparing to sprint — Stock Photo
    High angle close up of female athlete practicing at a sports stadium, in position on starting blocks, preparing to sprint
    Carpenters framing a house at a building construction site — Stock Photo
    Carpenters framing a house at a building construction site
    Laptop, robotic machine and remote control on table in warehouse — Stock Photo
    Laptop, robotic machine and remote control on table in warehouse
    Front view of a shirtless, athletic Caucasian man wearing sports clothes cross training at a gym, working out with battle ropes — Stock Photo
    Front view of a shirtless, athletic Caucasian man wearing sports clothes cross training at a gym, working out with battle ropes