不纯用英语怎么说？

不纯

• [医] impurity

例句

• His heart cannot be pure whose tongue is not clear. 嘴不净者心不纯。
• Outcasts ( eta ), people with professions that were considered impure, formed a fifth class. 剩下来的, 人们认为其职业不纯洁的, 便成为了第五个阶层.
• The impurity of supposedly pure subcellular fractions is a constant threat to the plant biochemist. 以为亚细胞组分很纯而实际不纯的情况,一直是植物化学家感到难办的问题.
• Purists bemoan the corruption of the language. 主张语文纯正的人哀叹语言趋于不纯.