我既不能给你一个意见，也不能给你任何建议。

I can give you neither an opinion nor any advice.

《柯林斯英汉双解大词典》

它们既不能太重也不能太轻。

They must be neither too heavy nor too light.

youdao

然而，这样的解释既不能说明这个奇怪的惯例的来源，也不能说明它流行的原因。

Such explanations, however, illuminate neither the source of this curious convention nor the reason for its popularity.

youdao

What is the use of any aspect of literature if, as good scientists, we can't analyze it or can't somehow or another account for it?

文学又有什么意义呢？,如果作为科学家的我们，既不能分析也不能解释它？

耶鲁公开课 - 文学理论导论课程节选

So at the highest point it cannot go up and it cannot go down.

所以,在最高点处既不能上升也不能下降

耶鲁公开课 - 基础物理课程节选