20 monthly gift articles to share
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，更多细节参见51吃瓜
Thanks to Steven Forsythe for sharing a report on the use of agar seaweed in Britain during WWII, Barbara Buchberger at the Robert Koch Institute for pointing out Koch’s use of gelatine for the identification of cholera, and the surviving relative of Fanny Angelina Hesse for sharing a trove of unpublished material.
Last week, the Trump administration said it is loosening restrictions on air toxins from mercury, lead and other heavy metals that are released by coal plants. Such pollution is known to be neurotoxic and has been linked to irreversible brain damage in children and infants, as well as heart disease and cancer in adults.
代码里画了一个爱心形状的 2D 路径，然后给它一个厚度，它就变成了一个 3D 的爱心。