You need a grammar to describe how to build "sentences" (or models) from those terms, and you need a concrete syntax to express them 3.

你还需要一种语法来描述如何通过这些术语组成“语句”(或者模型)，同时需要一种具体的句法去表示它们3。

youdao

I said to her that for her composition, I could hardly make any correction or revision, because she has got the hang of it in terms of writing skills, structures, vocabulary and grammar.

我对她说, 对于她的作文, 我已经没有什么好改的了, 因为她已经基本掌握了作文的写作方法, 文章的结构, 内容编排以及词汇语法都已达到相当的水平, 完全符合高级的要求, 如果再改的话恐怕就是朝满分作文努力了.

youdao

In the original parser, expressions like "5 + 5 + 5" were acceptable owing to the rep combinator in the grammar definition for expressions (expr) and terms (term).

在原来的解析器中，可以接受像“5 + 5 + 5”这样的表达式，因为语法中为表达式(expr)和术语(term)定义了rep组合子。

youdao