But who will help you correct if you don 't speak idiomatically ?

可是如果我们说的不符合习惯用法谁来帮我们纠正呢？

Grammatically right but idiomatically wrong .

文法上对，但惯用法上错。

It is always better to design idiomatically , using metaphors only when a truly appropriate and powerful one falls in our lap .

习惯用法的设计总是更好，只有在非常合适，并且发现了非常强大的隐喻时，才使用隐喻。

Idiomatically people often use the " ungrammatical " present tense because it sounds more lively .

根据英文惯例，「不合文法」的现在式常见使用，因为看来较为生动。