You cannot tell a lie.

你不能说谎。

youdao

I cannot tell you what Heidi means to me!

我无法告诉你，海蒂对我有多重要！

youdao

I cannot tell you how much your letter delighted me.

我无法告诉您，您的来信使我多么高兴。

youdao

I cannot tell you her name, because her husband is a powerful man in the French government.

VOA: special.2009.12.26

You see you cannot tell the height or the depth rather of a pool based on the average.

只知道平均值,并不知道游泳池的水深。

哈佛公开课 - 幸福课课程节选

I will be happy to admit that I read through this I probably cannot tell you what it did unless I really obsessed over these details.

我不得不承认，恐怕我读完后,也不能告诉你它都干了些什么,除非我完完全全被这些细节给迷住了。

哈佛公开课 - 计算机科学课程节选

Just how long the series will be is something Mr Cornwell will not, or cannot tell.

ECONOMIST: Writers in profile

You cannot tell me that that is an efficient way to generate better health.

FORBES: How To Solve The Health Care Crisis

The book is lying open in his lap, so the man cannot tell what it is.

NEWYORKER: The TV