Not many foods naturally contain vitamin D. Foods high in this vitamin include oily fish such as salmon, tuna and mackerel, and fish liver oils.是什么意思_Not many foods naturally contain vitamin D. Foods high in this vitamin include oily fish such as salmon, tuna and mackerel, and fish liver oils.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句