那些理论的语法的解释难以理解，难以记忆，更难以运用。

Theoretical grammatical explanations are hard to understand, hard to remember, and even harder to use.

youdao

那些理论的语法的解释难以理解，难以记忆，更难以运用。

Theoretical grammatical explanations are hard to understand, hard to remember, and even harder to use.

youdao