There are quite a few imprecise words in our daily expressions.

我们的日常用语中有相当一部分是不确定语。

In this book, people can find a lot of daily expressions they may know how to say in Chinese, but can hardly make it come across in English.

在这本书里，大家可以找到很多日常的表达方式，他们可能知道怎么用汉语说，但是换成英语就很难表达了。