As an undergrad, you don't have to worry about it, you're just worried about learning.

我们还要造一个新的探测器,这会不会太浪费时间？作为一个本科生,你就不用担心这个了，你可以在上面花时间。

麻省理工公开课 - 化学原理课程节选

And similarly, while we're at it--this is not a Matrix-like worry-- if you're worried about, yeah, but what's happening ? to world poverty while I'm doing all of this?

大家不必担心《骇克帝国》的情景-,如果你担心，当我接受实验时,国际贫困情况是否会恶化？

耶鲁公开课 - 死亡课程节选