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免費 Erlenmeyer 視頻

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closeup of lab researcher hands dripping pure liquid in lab flask
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快速沸騰水的表面在 erlenmeyer <unk>中
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erlenmyer flask that is being heated by a bunsen burners no condensation left, heat waves visible in flask, bubbles rapidly forming
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drop of blood falling into test tube of water
redheaded doctor in front of camera on gray background.
laboratory beakers with data and structural formula of chemical compounds in the foreground
woman chemist adding chemical reagent in pure liquid at glass flask
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dripping chemical liquid in glass flask. chemical reaction in lab flask
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a medical research experiment in a chemistry lab
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test tubes with white liquid being shaken in a chemistry laboratory
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燃燒器加熱的 erlenmeyer 瓶子沒有凝結,熱波在瓶子中可見,形成氣泡
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在 erlenmeyer <unk>子子內部形成的凝結,因為內部的水被加熱
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scientist pouring liquid into a erlenmeyer flask
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blue and red liquid pouring into beakers
empty glass flasks in laboratory. closeup. laboratory glassware
green liquid pouring into beaker
african american doctor on grey background.
test tubes filled with white liquid are being shaken in a chemistry laboratory, representing the effort to find cures for cancer and covid-19
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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
lab scientist pouring liquid in lab flask. scientist doing laboratory experiment
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pull focus close up shot of condensation droplets on neck of bottle of cold beer or soft drink with metal cap
在 erlenmeyer 瓶底部開始沸騰的水
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medical lab worker dripping reagent in chemical liquid at lab flask
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scientist mixing titrant and analyte in an erlenmeyer flask by shaking in an orbital motion - titration procedure in the lab - close up
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scientist pouring test tube liquid into a erlenmeyer flask
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scientist conducting an experiment
在 erlenmeyer 瓶中煮沸的水的表面上
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科学家将样品倒入杯子中
在化學教室用bunsen燃燒器加熱的erlenmeyer瓶中沸騰的水
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chemical reaction observed in a laboratory setting
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用磁動器在 erlenmeyer 瓶中進行清晰的液體封閉
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在高中化學實驗室用各種化學玻璃器具橫跨黑色實驗室長椅
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african american doctor on grey background.
serious african american doctor on grey background.
在 erlenmeyer 大瓶中,用磁<unk>混合器将铜硫酸盐的蓝色稀释溶液关闭
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laboratory beaker with data and structural formula of chemical compounds in the foreground
laboratory worker preparing experiment at lab
drop of blood falling into test tube of water close up
scientist holding erlenmeyer flask with liquida
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靠近 erlenmeyer 瓶子正在被 bunsen 燃燒器加熱,沒有凝結,熱波在瓶子中可見,氣泡迅速形成
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scientist conducting a botanical experiment
redheaded doctor in front of camera on gray background.
lab doctor pouring transparent liquid in lab flask with pipette
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chemical reaction in lab flask. chemist hands doing chemical experiment in flask
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student taking notes in a chemistry lab
a scientist wearing blue gloves analyzes a white liquid in a conical flask in the laboratory
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在高中化學課室的黑色實驗室長椅上,將清晰的液體倒入 100 ml 的升級圓柱體
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在高中化學實驗室中,用各種化學玻璃器具向上傾斜以揭示黑色實驗室長<unk>
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female scientist pouring reagent in lab flask. scientist doing chemical reaction
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