This reinforces to me the pointlessness of what I’m thinking.

这能够提示我：现在所想的是毫无意义的。

This punishment did initially strike me as something of an exercise in pointlessness.

开始时，我的确认为这种惩罚毫无意义。

The pointlessness and sheer waste of effort in these school reports is quite something.

在这些成绩单上所作的工作毫无意义，完全是一种浪费。

They realize the pointlessness and irrationality in earning more money when they already have more than they can possibly spend but they do not stop.

他们意识到当他们已经拥有花不完的钱时继续挣更多的钱是无意义也不理性的，但他们就是不能停下来。