Also, steroid use and illegal drug use should be avoided.

此外，甾体激素类使用和违禁药物使用也应当避免。

This illegal drug can be found in small amounts on a $100 bill.

百元钞票里就含有这种少量非法药物。

It's vitally important that we take action against illegal drug sales.

对非法药品销售采取反制措施是很重要的。