Cholesterol is also part of the myelin sheath that surrounds and protects neres, and it is used to make itamin D, bile, and some hormones.是什么意思_Cholesterol is also part of the myelin sheath that surrounds and protects neres, and it is used to make itamin D, bile, and some hormones.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句