所有语言都有两种基本的用法——正式用法和通俗用法。

All languages have two general levels of usage—a formal level and an informal level.

youdao

必定存在着一些属于正式语言的单词和短语，也存在着另一些属于非正式语言的词汇短语。

There are bound to be some words and phrases that belong in formal language and others that are informal.

youdao

exi格式使用一种源于信息和正式语言理论的混合方法以及经过测量验证的实践技术对XML信息进行熵编码。

The EXI format USES a hybrid approach drawn from the information and formal language theories, plus practical techniques verified by measurements, for entropy encoding XML information.

youdao

When I'm talking about language I'm meaning systems like English and Dutch and Warlpiri and Italian and Turkish and Urdu and what we've seen and heard right now in class in the demonstration that preceded the formal lecture.

当我谈到语言时,我指的是诸如英语,荷兰语,沃皮利语,意大利语,土耳其语,乌尔都语这样的语言系统,以及我们在正式上课之前的课堂演示中,所看到和听到的语言系统

耶鲁公开课 - 心理学导论课程节选