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免費 物理化學 視頻 - 頁面 3

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scientific data written in chalk moving on a blackboard
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兩個聰明的小朋友在做工程學的學校項目
animation of dna strand and numbers changing, medical data processing on grey background
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glowing dna double helix
animation of element diagrams over mathematical equations on black background
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两名儿童正在进行电气施工的近距离拍摄
chemical formulas and laboratory experiment animation over scientists working with test tubes
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little boy with laboratory glassware and a microscope. kids and science.
animation of scientific data processing on white background
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animation of chemical icons and mathematical equations over black background
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abstract blue background design
national science day
animation of chemical symbols over liquid pouring into lab glass
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pharmaceutical quality control of medical vials
animation of chemical formula over mathematical equations on black background
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animation of science data processing over dark background
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animation of dna helix, mathematical equations over rotating empty glass beaker
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animation of medical icons and dna strand on black background
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laboratory beaker with handwritten formula, data and structural formula of chemical compounds in the
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pull focus close up shot of condensation droplets on neck of revolving bottle of cold beer or soft drink with metal cap
medical workers analyzing patient heartbeat
chemical formulas and molecular structures animation over scientific data charts
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scientist conducting an experiment
chemistry equations on a whiteboard
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science lab illustrations
戴着面具的小女孩们正在建造机器人
animation of chemical formula over mathematical equations on black background
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戴眼鏡的年輕女子的肖像,她的子和手圍著一條白色寵物蛇,手在綠色背景上2
两名学童在做工程项目的近距离拍摄
animation of network of profile icons and screens with mathematical equations on blue background
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science study of the future
兩個學生一起做一個有趣的項目
chemicals falling in the beakers against chemical structure and formulas on white background
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animation of scientific data processing over blue background
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animation of scientific data processing over robot's arm
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student looking at the chalkboard during math class.
animation of scientific data processing over chemical icons
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兩個中學學生一起做一個項目
person going over a chemical formula to insure accuracy
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animation of light bulb and scientific formule data processing
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animation of mathematical equation and diagrams against illuminated server rack in server room
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chemical solution is being poured into a beaker with periodic tanle and molecule in background
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animation of mathematical equations over caucasian female student looking at vials in lab
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little boy and girl wearing face mask with laboratory glassware. kids and science.
animation of chemical formulas on grey background
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animation of 3d micro of molecules and chemistry icons on blue background
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animation of dna strand and medical data processing on blue background
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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
animation of scientific data processing over caucasian male scientist in laboratory
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animation of mathematical equations and chemical structures floating against white background
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