如果选择错误，后果可能不堪设想。

But if they make the wrong choice the results could be disastrous for them.

因缺爱而死，那是不堪设想的。

To die for lack of love is horrible.

你不能采用机场安检措施，因为由此耽误的时间不堪设想。

You cannot apply airport measures because the delays it would create would be impossible.

但所有人都知道，一旦喷气发动机和双翼飞机分崩离析，后果将不堪设想。

But all know that if the jet engine and the biplane came apart, the result would be a horrible, fiery crash.

人言可畏，今天如果我们受了郑相国的好处，将来别人说我们与郑相国关系密切，怪罪下来，后果就不堪设想了。

Rumor is dreadful. If now we accept his benefit, in the future, people would say that we have close connection with the Ministry, then, the consequence might be worse.