What you're supposed to know: a waxy, fatty material, cholesterol is produced by the liver and carried in the bloodstream.
必备知识：胆固醇是一种油腻的膏状物，由肝脏产生并携带于血管中。
Cholesterol is a hard, waxy, fat-soluble (as opposed to water-soluble) substance that is synthesized in all cells of the body, but primarily in the liver.
胆固醇是固态、蜡白色、脂溶性物质，可由躯体所有细胞合成，但主要在肝。
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