反义词：impure

例句

These sheets are 100% pure cotton and comfortable to sleep on.

这些床单是100%纯棉的，睡在上面很舒服。

Children have pure thoughts.

孩子们有纯洁的思想。

Class should not only teach pure theory， but also combine with practice

学生课堂上不应只教授纯理论，还应结合实际操作