比如，如果指定或者期望出现特定的短语 “I am sad”，通常要按照文法规则明确定义它，如：(eye am sad)。

Normally, if you specify or expect a specific phrase, such as "I am sad" you define the phrase explicitly in the grammar rules, for example: (eye am sad).

youdao

如果在同一个文件里混用多种语言，必须保证文法不会出现二义性，也就是说所有的输入都只能存在一种解释。

If you want to combine languages inside of a file, you have to be sure that the resulting grammar isn't ambiguous, i.e. that for each input there is only one way to interpret it.

youdao

春秋战国时期(公元前770年-公元前221年)，中国开始制定成文法，出现了自成体系的成文法典。

In the Spring and Autumn and Warring States periods (770-221 BC), written law was promulgated in China, and a systematic written code of laws appeared.

youdao