2. case n. 事实,实情
例句：He thought he had already solved the problem, but that was not the case.
他以为他已经解决了这个问题,可是实际情况并非如此。
3. discuss vt. 谈论, 讨论; 商量, 论述
例句：They discussed selling the house.
他们商讨卖房子一事。
4. experience n. 经历; 经验, 体验
例句：None of the others have lived my experiences.
没有任何人体
