Last year, he applied to Harvard University for a scholarship and succeeded in passing a difficult examination.
去年,他向哈佛大学申请奖学金并通过了一个很难的考试。
If they knew how difficult it was to drill through the hard rock, they would lose heart.
如果他们知道了钻透那坚硬的岩石有多么困难,他们会丧失信心的。