记忆方法
将“impurity”分解为“im”和“pure”。想象“im”代表否定或相反，“pure”代表纯净。所以，“impurity”可以理解为“不纯净”或“杂质”。通过这样的对立关系来记忆，这个单词就更容易记住了。
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英语词源
- impurity (n.)
- mid-15c., "thing which makes or is impure;" c. 1500, "fact or quality of being impure," from Middle French impurité, from impur (see impure). Related: Impurities.
权威例句
- 1. The oxygen reacts vigorously with the impurity in the iron.
- 氧气与铁中的杂质发生剧烈的化学反应.
- 2. This impurity must be purged away after death.
- 这种污秽应该在死后加以净化.
- 3. 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.
- 4. Silica, in fact, is a desirable impurity because it is one of the reactants.
- 硅石实际上是一种有用的杂质,因为它是一种反应剂.
- 5. Reasons of forming first cracks were foundry lacuna, impurity gathering , lard exiting.
- 铸造缺陷 、 杂质元素偏聚和夹杂物的存在是形成早期裂纹源的原因.