Translation of "Comprehend" in Chinese

It seems this is something you can't comprehend.

看起来，这是一个你无法理解的东西。

This theory is too difficult for me to comprehend.

这个理论对我来说太难了，理解不了。

The professor was unable to comprehend what I meant.

教授不明白我說了甚麼。

- Many people cannot understand the way hackers behave.
- Many people are unable to comprehend the actions of hackers.

很多人无法理解黑客们的行为。