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免費 化學家 視頻 - 頁面 2

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scientist conducting experiment with colorful liquids
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in school, in a classroom, a young asian student examines chemical reactions
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microbiology laboratory: scientist works with various bacteria. concept of pharmaceutical research for antibiotics curing disease with dna enhancing drugs. a man doctor with a microscope. high quality 4k footage
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animation of test flask, mathematical equations and dna strand diagrams over black background
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conducting science experiment, child with safety goggles using pipette over chemical formulas animat
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little girl interested in science plays with laboratory glassware
白人研究員穿著防護服的男子,在綠色田野中進行害蟲控制時,握著試管
白人研究人员穿着防护服,手持试管,在绿地进行害虫控制时使用笔记本电脑
animation of mathematical equations on caucasian male scientist performing experiment at laboratory
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scientist examining a fossil in a laboratory
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science experiment in a laboratory
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年輕照顧者在幫助他使用智能手機應用程式時,與戴眼鏡的老年人傾偈
animation of mathematical equations on caucasian male scientist performing experiment at laboratory
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animation of chemical formula and network of connections over caucasian male teacher
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scientists examining ancient human remains in a laboratory
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白人研究人员穿着防护服, 拿着试管和树枝在绿地进行害虫控制
scientist experimenting molecule structure
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研究人员的后视,手套上的女人在绿色的田野里敲打玻璃
little girls interested in science
兩個學生一起做一個有趣的項目
science experiment with liquids
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animation of scientific data processing over caucasian male scientist in laboratory
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白人研究員穿著防護服,拿著試管,在綠地進行害蟲控制時使用筆記型電腦
animation of mathematical equations over caucasian male scientist doing experiment in lab
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girl, molecular structure and child scientist
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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
student taking notes in a chemistry lab
scientist working in a laboratory with plants
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scientist experimenting molecule structure
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bearded caucasian male researcher wearing protective glasses and working with a microscope spbas. scientist using microscope in a laboratory. search for coronavirus vaccine. high quality 4k footage
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laboratory beaker with data and structural formula of chemical compounds in the foreground
animation of mathematical equations over female scientist holding test tube
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scientist looking into a microscope
白人研究者身穿防护服的男子在绿色田野中进行害虫控制时拿着试管和树枝
woman doing control at brewery
kids and science. little boy and girl with face mask using a microscope.
同學們在室內用燈泡一起做學校項目
女员工在办公室的黑暗房间里向同事解释图形的幻灯片
animation of mathematical equations over biracial female scientist pouring chemical in a beaker
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man feeding pets
science students looking at blue chemical together using computer
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scientists test for covid-19 or corona virus by using science tubes to research and treat illness in a lab or hospital. medical treatment concepts. high quality 4k footage
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白人研究人员穿着防护服,手持试管,在绿地进行害虫控制时使用笔记本电脑
animation of mathematical equations over vaccine and vials
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male scientist experimenting in laboratory 4k
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let's work this out
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male scientist laboratory worker with tube test
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science experiment in progress
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male scientist experimenting in laboratory 4k
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animation of element diagram over happy african american senior female patient in hospital room
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