young man scientist smiling confident pouring liquid test tube laboratory |
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| navigate by keyword : young hispanic man guy beard blond adult person portrait handsome expression science research medicine scientist experiment technology medical professional microscope chemist biology analysis work worker working test tube glasses smiling confident measure measuring measurement liquid pipette pouring holding gloves happy smile clinic center hospital room indoor indoors lab laboratory pharmacy chemistry |
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| Young man scientist smiling confident pouring liquid on test tube at laboratory |
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