Impurities
n. 杂质（impurity的复数）
🗣️ 情景例句
Do you need-that-pencil?
你要那只铅笔吗？
John's parents will rejoice at his safe return.
约翰的双亲会因他的安然归来而惊喜万分。
It comes nearer to the engines with which man has 'conquered' the air, as he boasts.
它更近乎于人类自夸的“征服”了空气的发动机。