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免費 Chemistry 視頻

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little boy and girl with face mask using a microscope. kids and science.
chemical structures and molecular formulas animation over dark background
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animation of chemical formula over black background
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little girl interested in science plays with laboratory glassware
animation of test flask, mathematical equations and dna strand diagrams over black background
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animating scientific equations and chemical structures over hand-drawn sketches on grid paper
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abstract molecular structure
the movement of blue particles in the form of honeycombs inside the sphere. looped animation.
chemical structures and molecular formulas over dna strand animation
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animation of atoms over laboratory dishes on grey background
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little boy and girl wearing face mask with laboratory glassware. kids and science.
molecular structures and chemical formulas, scientific research animation over dark background
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science of the future
pouring liquid into beaker, chemical structures and formulas in background animation
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chemical formulas and molecular structures animation over black background
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laboratory research concept. group of scientists discussing microscope research
kids and science. little boy and girl with face mask using a microscope.
animation of data processing and chemical formula over caucasian male scientist doing experiment
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molecules and biology, biological concept, 3d rendering.
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blue and red liquid pouring into beakers
animation of chemical elements
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green liquid pouring into beaker
video of chemical drafts
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green screens popping up on chemical drafts
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funny brave girl adds catalyst powder into bottle near tutor
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scientist conducting an experiment
woman looking at chemicals
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科学家将样品倒入杯子中
molecules and atomic structures animation over blue and green gradient background
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animation of scientific data processing over liquid in laboratory test tube
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little girls interested in science
animation of molecule structures over liquid moving in laboratory flask against blue background
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animation of element diagrams and chemical equations on red and blue background
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laboratory beaker with data and structural formula of chemical compounds in the foreground
animation of mathematical equations over biracial girl smelling chemical in a flask at laboratory
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animation of mathematical equations and glowing molecular structures against black background
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student taking notes in a chemistry lab
animation of scientific data processing over dark background
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molecular structures floating over space animation with stars and particles
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scientist putting chemicals into tubes
conducting science experiment, child wearing safety goggles holding test tube, animation of molecula
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green liquid pouring into beaker
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in school, a young african american student examines a test tube in the classroom
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animation of multiple molecule structures over stream of chemical against blue background
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animation of white structural formulae of chemical compounds on blackboard
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laboratory beakers with data and structural formula of chemical compounds in the foreground
little boy with laboratory glassware and a microscope. kids and science.
science of the future
close up of bunch of balls on table. vertical looped animation
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