重點(diǎn)講解：
1. serve as
用作；可當(dāng)…使用；充作；
eg. She ushered me into the front room, which served as her office.
她把我領(lǐng)進(jìn)了她用作辦公室的前廳。
eg. Such stories serve as a spur to children's imagination.
這類故事能激發(fā)兒童的想像力。
2. so that
（用于引出原因）為了；以便；
eg. People wear spectacles so that they can see better.
人們戴眼鏡是為了看得更清楚。
eg. He pitched his speech so that even the children could understand.
他帶著一種特殊的表情講話，以便孩子們能聽懂。
3. try to do sth.
設(shè)法；嘗試；努力做某事；
eg. It is a great folly to try to persuade him.
試圖說服他未免太愚蠢了。
eg. Don't try to impose your wishes on us.
不要試圖把你的愿望強(qiáng)加給我們。