Biological lipids originate from ketoacyl and isoprene groups.

生物脂质来源于酮脂酰和异戊二烯基团。

Archaean cell walls lack murein, and their lipids have ether links rather than ester links.

古细菌的细胞壁缺乏胞壁质，其连接是醚连接而不是酯连接。

But are lipids toxic?

不过，脂质真的有毒吗？

They actively break down fat compounds and lipids.

它们活跃地分解脂肪化合物和类脂。

Lipids are fats that are found throughout the body.

油脂就是遍布全身的脂肪。