杂质

例句：

1. 1. The waterwas so dirty that it tasted likesoap.
   水太脏了，尝起来像肥皂。
2. 2. Thefood was contaminated withtoo many impurities.
   食物被太多的杂质污染了。
3. 3. The machine had alot of impurities in its parts.
   这台机器的部件里有很多杂质。