It must first be understood that XSL, like all other programing languages, is merely a grammar specification in need of an implementation.

首先必须理解：象其它所有编程语言一样，XSL只是一种需要实现的文法规范。

youdao

In some cases, you might want to provide your own grammar pool implementation.

有时候可能希望提供自己的语法池实现。

youdao

Providing your own grammar pool implementation.

提供自己的语法池实现。

youdao

The trustees said they "recognised the concerns expressed by governors of grammar schools about the implementation of the policy".

BBC: Edmund Rice Schools Trust to phase out academic selection