substanceIELTS重点词汇

A substance is a solid, powder, liquid, or gas with particular properties.

双语例句例： There's absolutely no regulation of cigarettes to make sure that they don't include poisonous substances.

没有任何规定来保证香烟不含有毒物质。

例： The substance that's causing the problem comes from the barley.

造成这个问题的物质来自于大麦。