重点讲解：
1. a period of time
一段时间；
eg. It is said that he writhed under insults for a period of time.
据说有一段时间他因受辱而极为痛苦。
eg. We lived in Beijing for a period of time.
我们曾在北京住过一段时间。
2. would like to do sth.
（表示愿意）想要；
eg. I would like to have a word with you.
我想同你说句话。
eg. Ideally, we would like to start at the beginning.
要是有可能，我们真想从头开始。
3. so that
（用于引出结果）因此，所以；
eg. There was snow everywhere, so that the shape of things was difficult to identify.
到处是雪，所以万物的形状都难以辨认。
eg. Shelly had prepared carefully for her biology examination so that she could be sure of passing it on her first attempt.
雪莉对生物考试准备得很认真，因此她有信心一次就通过。
