1)impurity,不纯净物2)virgin material,纯净物料3)Impurity determine,纯净物4)the impure component,不纯净组分5)uncleaned fiber,不纯净纤维6)His heart cannot be pure whose tongue is not clear,嘴不净者心不纯
用法例句
The relationship between the impure component within diamond and the mantle fluid is also discussed.