单词 | bone strength |
释义 | bone strength The ultraviolet (UV) rays in sunshine are needed for the skin to make vitamin D, vital for bone strength and protecting against rickets. Times, Sunday Times (2014) I've undergone numerous drug trials over the years in an attempt to improve my bone strength. The Sun (2012) I've heard that bone strength is largely down to diet in teenage years. Times, Sunday Times (2011) |
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