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免費 學生科學 視頻

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兩個孩子一起做一個有趣的項目
pupils doing science together in class
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兩個學生在做工程學的學校項目
kids doing a chemical experiment in laboratory
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in school, in a classroom, a young asian student examines chemical reactions
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little boy and girl with face mask using a microscope. kids and science.
animation of mathematical equations over biracial girl smelling chemical in a flask at laboratory
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video of happy biracial boy with microscope during lesson
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兩個聰明的小朋友在做工程學的學校項目
little boy with laboratory glassware and a microscope. kids and science.
students and their teacher conduct a science experiment in a laboratory
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多種族兒童坐在電腦顯示器前,在鍵盤上打字,而男性老師幫助他們
兩個孩子在做工程學的學校項目
conducting science experiment, child holding beakers with molecular structure animation
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animation of a group of happy schoolchildren using microscope in science class
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kids and science. little boy and girl with face mask using a microscope.
兩個中學學生一起做一個項目
兩個聰明的小朋友在練習電氣工程的興趣
happy little asian boy eating fresh waffles for breakfast enjoying delicious homemade meal with family in kitchen at home 4k
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school kids doing a chemical experiment in laboratory
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兩個學生一起做一個有趣的項目
students in a science lab using microscopes
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animation of kids using digital tablets over social media signs in the background
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兩個戴眼鏡的聰明現代孩子在做項目工作
一個女孩<unk>接,一個男孩用螺旋<unk>做教育項目
同學們在室內用燈泡一起做學校項目
portrait of schoolgirl standing with arms crossed in laboratory
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globe and connections against schoolgirl in laboratory
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戴着面具的小女孩们正在建造机器人
using pipette in science experiment, girl surrounded by chemical structure animation
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兩個孩子白天在家裡做電子學校的項目
兩個瘋狂的孩子坐在辦公桌旁做項目工作
smiling girl conducting science experiment with molecular structure animation over classroom
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girl drips blue liquid with pipette at tutors support in lab
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science teacher, children and chemistry class
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man pours catalyst girl student wondered of rising up drops
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conducting science experiment, child and teacher with lab equipment animation
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戴着面具的小女孩建造机器人 1
animation of mathematical equations over two diverse girls in science class in laboratory at school
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兩個聰明的小朋友在家裡做學校項目
students in a science lab looking at specimens under microscopes
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girl nods looking at asian lab assistant adding reagent
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science, research and teachers with children
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chemistry teacher explaining molecular structures over children in science classroom
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school girls writing in journal book while experimenting in laboratory at school
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兩個西班牙裔孩子一起做學校項目
molecule structures moving against two female students taking notes in laboratory
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animation of chemical molecules over biracial female scientist taking sample in lab
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animation of school items icons over diverse schoolchildren learning with teacher in lab
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conducting science experiment, child with safety goggles using pipette over chemical formulas
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