短语学习：

1. shut off: 关上

eg. If you smell gas or see a broken line, shut off the main valve from the outside.
如果闻到煤气味儿，或看到管道破裂，要关掉从外面进屋煤气管道的主阀门。

eg. His girlfriend left the week before, less than a day after they shut off the electricity.
他的女朋友一个星期前离开了，在他们切断电源后不到一天。

2. sit for: 为……而坐下来

eg. I am not so sick but I can come to sit for the exam.
尽管我生病了，但还是能来参加考试，或，我还没有病到不能来参加考试。

3. turn out: 生产；结果是；关掉；出动；驱逐

eg. It may turn out, however, that some differences both between and within groups are quite marked.
然而，它也可能证明：两个种群之间和种群内部的一些差异是相当明显的。

简单口语：

She's on the other line, she's gonna call me back.
她正在讲电话，等一下会回我电话。

on the other line 表示在接另一个电话

eg. Mr Jones is talking on the other line; would you like to hold on for a minute and I'll put you through as soon as he's available.
琼斯先生正在接另一个电话，请稍候一会儿，他一有空我就给你接过去。

call back 回电；收回

eg. Forget the lag time of email or waiting for a call back.
不再需要无止境地等待电子邮件或者是电话回复。