水的纯度定期检测。The purity of the water is tested regularly.要求学生们检验铜的纯度.The students are asked to prove the purity of copper.我们可以保证它的纯度.We can guarantee it pure....
As far as mathematicians are concerned, there's a certain virtue in wearing intellectual blinkers.就数学家们来说，用学者的眼光来看问题不无裨益。As I opened my blinkers, guess who I saw?当我睁开眼睛时, 你猜我看见了谁?That horse dislikes wearing blinkers...
Angela says she longs to join an amateur dramatics class.安杰拉说她渴望参加业余戏剧班。She longs for the early return of her beloved.她盼着心上人早日归来.She longs to be his companion through life.她渴望成为他的终身伴侣....