Although most condoms contain spermicide, there are some manufactured without.

尽管大多数避孕套都含有杀精剂，但也有一些是不含的。

However, spermicide on its own is actually a pretty poor method, so make sure you do combine them.

然而，实际上杀精剂本身就不是一个好办法，那么请保证将二者结合起来使用。