middle age grey haired man scientist talking smartphone using touchpad laboratory |
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| navigate by keyword : middle age greyhaired man male adult elderly mature person senior beard serious relaxed science research medicine scientist experiment technology medical professional microscope chemist biology analysis worker working test tube laptop computer internet table sitting glasses touchpad tablet screen smartphone cellphone talking speaking clinic center hospital room indoor indoors lab laboratory pharmacy chemistry |
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| Middle age grey-haired man scientist talking on smartphone using touchpad at laboratory |
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