n. worthless or dangerous material that should be removed
n. the condition of being impure
词态变化
复数形式:impurities
常见例句
1
easily perceptible a accurately stated or described a free from clouds or mist or haze s free of restrictions or qualifications s free from flaw or blemish or impurity s clear of charges or deductions s easily deciphered s freed from any question of guilt s characterized by ease and quickness in perceiving
2
having little or no hue owing to reflection of almost all incident light a of or belonging to a racial group having light skin coloration s free from moral blemish or impurity
