重点讲解：
1. not have a clue
不知道；一无所知；
eg. I didn't have a clue what she was thinking.
我不知道她在想什么。
eg. I haven't had a clue what I was doing all day.
我也不知道我今天一天都在做什么。
2. for some reason
不知为何；不知什么原因；
eg. For some reason, the curtains were shut.
不知什么原因，窗帘拉着。
eg. For some inexplicable reason she was attracted to Patrick.
因为某些无法解释的原因，她被帕特里克所吸引。
3. be covered with
被…覆盖；
eg. The road was covered with fir needles.
这条路上铺满了冷杉针叶。
eg. The fields were all covered with pure white snow.
白雪皑皑，铺满田野。
4. at this point
此时； 在这个时候；
eg. At this point the writer puts in a flashback.
作者在这里安插了一段倒叙。
eg. At this point nothing can pep him up.
现在什么也不能使他振奋起来。