First of all just we talk about that we need to get the topic sentence, right, you need to get the topic sentence when listening, so now let's see, what's kind of topic sentence you need to get.

还有一些像这样的短语缩写，首写字母，但是原则是你要能够辨别的出来自己写的，别自己都认不出来自己写的，要不写完了也没有意义，大家稍微看一下主要是方法。

youdao