重点讲解：
1. in fact
事实上，其实；
eg. He said he did not care, but in fact he was very unhappy.
他说他不在乎，但事实上他很不高兴。
eg. In fact, I think too much, and I should lighten myself of it a little.
事实上我确实想得太多了，我应该让自己放松一点。
2. look for
找；寻；
eg. Honestly, I think sometimes people look for meaning where there just isn't any.
老实说，我觉得人们总是在寻求一些根本不存在的意义。
eg. Upon receiving news of the pending cancellation of his contract, he began to look for a new job.
他收到合约即将被解除的消息时，便开始找新工作。
3. a clue/clues to
线索；提示；
eg. Geneticists in Canada have discovered a clue to the puzzle of why our cells get old and die...
加拿大的遗传学家已经发现了解开细胞衰老、死亡之谜的线索。
eg. Dr. desai searched online for clues to the problem.
德赛医生到互联网上去搜索解决这个问题的线索。