young chinese man working scientist laboratory holding smartphone smiling happy pointing with hand and finger the side |
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| navigate by keyword : chinese finger hand happy laboratory man pointing scientist side smartphone smiling young adult asian blank cheerful chemistry clinic confident emotion experiment expression face friendly gesture glasses handsome hopeful idea joy lab look looking male microscope mouth one optimistic point professional research science screen showing smile |
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| Young chinese man working at scientist laboratory holding smartphone smiling happy pointing with hand and finger to the side |
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