我们在家里使用日常用语。

We use everyday language at home.

孩子们很快就学会了日常用语。

Children quickly learn everyday language.

这本书教你如何使用日常用语。

This book teaches you how to use everyday language.

学习日常用语对交流很重要。

Learning everyday language is important for communication.

旅行时掌握一些日常用语很有帮助。

Knowing some everyday language is helpful when traveling.

学日常用语这个方法最好了。

This is the best way to learn everyday phrases.

教学内容：日常用语和商务用语。

Teaching contents: Daily English and business English.

这只是个小例子，但在日常生活和日常用语中，递归的应用极为广泛。

Example but you could see the use of recursion in everyday life and in everyday use of language.

我们的日常用语中有相当一部分是不确定词。

Quite a number of imprecise words are used in our everyday speech.

它们就这样方便地不事声张地进入日常用语而不被人觉察到是外来者。

So they easily slip into everyday use and are not felt to be strangers.