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免費 Biological Experiment 視頻 - 頁面 2

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medical practice in modern dental clinic
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
chemical laboratory room woman technician is testing substance applying in plate for researching in microscope student medic or chemist
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female chemist is working with reagents and chemicals in laboratory taking samples from test tubes and mixing under microscope researching reaction
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女醫生用疫苗填充注射器的肖像
scientist researching on plants in laboratory. growing plants in lab
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scientist researching on plants in laboratory. growing plants in lab
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female scientist is exploring samples in microscope in laboratory chemical or microbiological expertise details of person and equipment
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研究人员的近距离视图 男人手拿着试管在绿色田野中进行害虫控制
medical student laboratory young woman is working with test tubes with chemicals and medical analysis making microscope slide for research and exploration
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白人研究員穿著防護服的男子,在綠色田野中進行害蟲控制時,握著試管
科学家在实验室 2 中研究培养皿中的细菌
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microbiologist woman is exploring sample in laboratory looking into microscope specialist of dna analysis medical lab in university of virology
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young chemist expert is experimenting in laboratory mixing substance and liquids in test tube researching reaction of medicaments laboratory testing
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covid-19 testing in laboratory male technician is doing pcr and serology tests using tubes with samples and microscope health care and pandemic of coronavirus
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白人女性和男性研究人员拿着化学物质和杀虫剂的试管,并在绿色领域使用笔记本电脑
戴着面具的小女孩建造机器人 1
女科學家在實驗室中注射液體或病毒入瓶子中
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scientist using a microscope in a laboratory
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crime expert is researching chemical in test tube in chemistry laboratory portrait of male scientist with dangerous reagent
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研究人员的后视,手套上的女人在绿色的田野里敲打玻璃
lab doctor looking microscope. science doctor microscope research
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virologists are exploring virus covid-19 in laboratory and developing vaccine for sick and healthy people pandemic of coronavirus and medicine
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白人研究員穿著防護服,拿著試管,在綠地進行害蟲控制時使用筆記型電腦
scientists working in a laboratory and supervisor
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白人研究者身穿防护服的男子在绿色田野中进行害虫控制时拿着试管和树枝
microbiologist is exploring dangerous bacteria by microscope in laboratory protecting himself by overall and mask with respirator closeup of human face
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male chemist specialist dressed ppe suit is working with toxic chemicals in laboratory dropping reagent in tube dangerous chemical experiment
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laboratory research concept. group of scientists discussing microscope research
scientist working with a microscope in a laboratory
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portrait of lab technician holding tube of blood sample
glassware and microscope in the laboratory, 3d rendering.
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development of biological weapon in medical laboratory male scientist in protective gown is viewing bacteria and virus by microscope scientific military base
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scientist pouring liquid into a test tube
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two men in a factory
young woman technician lab is working with microscope and looking to camera portrait of female health professional in hospital or science institute
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科学家在实验室1中研究<unk>里<unk>中的细菌
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male and female scientist looking through a microscope
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people doing control at brewery
scientific laboratory of development of bacteriological and biological weapon technician is dressed protective gown with mask for save health
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scientists test for covid-19 or corona virus by using science tubes to research and treat illness in a lab or hospital. medical treatment concepts. high quality 4k footage
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scientists looking through microscope
portrait of female paramedic in mask posing at camera
female scientist hand examining blood sample in test tube
scientist looking through microscope
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medical laboratory scientist preparing specimen sample using single-channel pipette
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兩個瘋狂的孩子坐在辦公桌旁做項目工作
dental composite polymerization procedure
白人研究員在綠色田野中進行害蟲控制時,身穿防護服的男子拿著試管
animation of scientific data processing over caucasian male scientist with test tubes in laboratory
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