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免費 實驗室化學 視頻

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plant seedlings growing under test laboratory glassware. germinated plant sprouts
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科学家在实验室中记录结果
laboratory beakers with data and structural formula of chemical compounds in the foreground
plant seedlings growing under test laboratory glassware. germinated plant sprouts
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medical ampoules on conveyor line
香槟 香蕉 香槟 泡泡的香槟 1 种
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test tubes with samples in a rack 4k
animation of dna strand and data processing over beakers with liquid
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在實驗室使用管道的科學家的近距離拍攝
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student performing a chemistry experiment in a laboratory
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male scientist pouring solution in medical vials 4k
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吸入空氣 進去科學小瓶子
plant seedlings growing under test laboratory glassware. germinated plant sprouts
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科学家将样品倒入杯子中
laboratory beaker with data and structural formula of chemical compounds in the foreground
塑膠測量圓柱體在實驗室中
doctor workplace modern clinic closeup. medical consultation online in hospital.
plant seedlings growing under test laboratory glassware. germinated plant sprouts
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demonstrating chemical reactions with sucrose and solutions
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蜂蜜的化學實驗室測試, 蜂蜜品質測試, 有害物質和殺蟲劑測試, 有機蜂蜜測試,蜂蜜養殖業務
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student taking notes in a chemistry lab
chemical solutions in laboratory flasks
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laboratory experiment with petri dishes
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animation of scientific data processing over test tubes in laboratory
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blue and red liquid pouring into beakers
chemical structures and equations floating over chemistry equipment in school laboratory
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demonstrating chemical reactions with sucrose and solutions
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chemist scientist looking microscope slide
laboratory research concept. group of scientists discussing microscope research
scientist using a scanning electron microscope (sem)
laboratory glassware
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scientist in lab coat mixing chemicals in a glass bottle in a lab
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scientist putting chemicals into tubes
animation of red shapes over beakers with liquid in lab
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animation of red shapes over beakers with liquid in lab
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用各種顏色填充液體的實驗室玻璃杯和瓶子進行掃描
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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
scientist hand warming tweezers. science laboratory research
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scientist hand warming tweezers. science laboratory research
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laboratory worker preparing experiment at lab
tilt down to a close up shot of conical flasks, which has yellow solution in them
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pan to a close up shot of conical flasks, which has yellow solution in them
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scientist hand writing on test beakers
milk testing in lab flask. food quality control. analysis of milk sample
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chemical reaction changes color in laboratory setting
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scientists looking through microscope
animation of atoms over laboratory dishes on grey background
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digital composite of two beakers and the binary system
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animation of nucleotides over caucasian girl pouring chemical from test tube to laboratory flask
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