语言不能表达我的悲伤。

Words cannot express my sorrow.

《柯林斯英汉双解大词典》

他解释说：“如果我不能表达我的想法，那它对任何人都没有用处。”

"My idea is no use to anyone if I can't express it," he explained.

youdao

不能表达消极情感是爱的恒久障碍。

Failure to express negative feelings perpetuates the withdrawal of love units.

youdao

It is not a world in which language can be understood as somehow or another a means of expressing thought.

在索绪尔眼中的世界，语言不能被理解为,表达思想的方式。

耶鲁公开课 - 文学理论导论课程节选

We've got to figure out somehow how it is that consciousness is never completely uninhibited, never completely does and says what it wants to say.

我们无论如何都应找出,为什么意识永远不能完全不受拘束，永远不能完全表达它想表达的东西。

耶鲁公开课 - 文学理论导论课程节选

So if it's not a cell that's going through division you can't use a retrovirus to express the protein.

如果细胞不在分裂阶段,你就不能用逆转录病毒来表达某个蛋白

耶鲁公开课 - 生物医学工程探索课程节选