我又冒着大太阳出去走了半小时。

来源: 2022-05-09 09:57:20 [博客] [旧帖] [给我悄悄话] 本文已被阅读:

It says "Midday is the best time to get vitamin D."

https://pubmed.ncbi.nlm.nih.gov/18348449/