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两项关于长笛手的研究和一项关于男孩头部的研究-让·安东尼·华多
~ Two Studies of a Flutist and a Study of the Head of a Boy (1716–1717) --Jean-Antoine Watteau (法国艺术家, 1684 - 1721)
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新型冠状病毒SARS 2019冠状病毒疾病影像7号-国家过敏和传染病研究所
-Coronavirus disease 2019 (COVID-19).
Colorized scanning electron micrograph of a cell (green) infected with SARS-COV-2 virus particles (purple), isolated from a patient sample. Image captured at the NIAID Integrated Research Facility (IRF) in Fort Detrick, Maryland.