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免費 隨機研究 視頻 - 頁面 2

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女醫生在紙上寫一個處方
scientist hand writing on test beakers
戴着面具的多民族医生团队在医院办公室观察数字显示屏时讨论covid肺病
stomatolog hand holding medical tweezers
animation of math formulas over female and male lab workers in safety clothes
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scientists in a laboratory with a genetic base sequence and a digital interface
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白人研究員身穿白色外套和防護眼鏡的女性在綠色田野中觀看試管
digital composite video of chemical structures and formulas against various equipment in laboratory
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laboratory worker preparing experiment at lab
animation of scientific data processing over caucasian male scientist in laboratory
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兩個聰明的小朋友在家裡做學校項目
animation of chemical molecules over caucasian female scientist taking sample in lab
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animation of dna and covid 19 over hands of caucasian male lab worker with liquids
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serious ethnic female trader analyzing cryptocurrency market statistics
scientists working in a laboratory with data and diagrams
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animation of network of connections and data processing over surgeons in operating theater
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戴著眼鏡的中年女性站在白板上,在黑暗辦公室的會議中解釋業務演示
animation of mathematical equations over diverse scientist in lab cityscape
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animation of network of connections over caucasian female scientist in laboratory
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ophthalmology clinic
animation of connections over diverse female and male lab workers with samples
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兩個孩子一起做一個有趣的項目
animation of scientific data processing over caucasian female scientist working in laboratory
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student performing a chemistry experiment in a laboratory
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animation of data processing over mid section of businesswoman using smartphone at office
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science man, microscope and research laboratory
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animation of scientific data processing over diverse students in laboratory
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mathematical equations against african american male health worker using microscope at laboratory
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animation of network of connections with data processing over scientists in laboratory
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medical ampoules on conveyor line
technicians in lab coats take notes on tablets while observing mechanical work in an automotive workshop, industrial setting with tools, equipment, and vehicles in the background
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兩個聰明的小朋友在做工程學的學校項目
animation of network of connections over female scientist in laboratory
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戴著醫療面具的白人高级女性醫生坐在醫院,在筆記型電腦上打字,在工作中與男性同事傾偈
scientists mixing chemicals on a test tube
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兩個聰明的小朋友一起做一個有趣的項目
doctor workplace modern clinic closeup. medical consultation online in hospital.
animation of network of connections over cup of coffee
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白人研究員女士在綠色田野中進行害蟲控制時,戴著防護服拿著試管
白人研究人员穿着防护服在绿地进行害虫控制时使用平板电脑和笔记本电脑
female scientist looking through microscope in laboratory
animation of mathematical equations over diverse scientists working in lab
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animation of chemical formula and data processing over caucasian male scientist doing experiment
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digital composite video of chemical structures and formulas against various equipment in laboratory
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白人女性和男性研究人员拿着化学物质和杀虫剂的试管,并在绿色领域使用笔记本电脑
partial view of lady putting on face shield while observing microscope and young technician adjusts vernier caliper, taps on tablet in lab with carburetor on table and white car parked in background
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animation of dna strand spinning over female scientist in laboratory
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animation of scientific data processing over caucasian scientists working in laboratory
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animation of mathematical equations over caucasian male scientist in lab
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animation of mathematical equations over african american doctor with blood bag
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