首先，有的教授上的課，以後可能用不到，而且會占用掉很多時間，這樣有些真

首先，有的教授上的課，以後可能用不到，而且會占用掉很多時間，這樣有些真正需要時間的事物會因此遭到犧牲。

結果 (英文) 1:

First, some lessons on the professor, the future may not use, and will take away a lot of time, so some things that really need time will therefore be subject to sacrifice.

結果 (英文) 2:

First of all, some professors may not be able to take up a lot of time later, and will take up a lot of time, so that something that really takes time will be sacrificed.

結果 (英文) 3:

First of all, some professors may not use their lessons in the future, and they will take up a lot of time, so that some things that really need time will be sacrificed.