Some pulled an all-nighter on a daily basis due to irrelevant academic background.

他有每天挑灯夜战，克服专业不相关劣势。

OK, the next idiom: 'Burn the midnight oil'.

好了，下个习语： “挑灯夜战”。

Sometimes, American English is confusing and hard to understand, like: burn the midnight oil.

有时候，语有些糊里糊涂，很费解，就比如：burn the midnight oil（挑灯夜战）。

No, not at all! I have to burn the midnight oil, I need to do well on this exam.

没有，没怎么准备。我今天不不挑灯夜战（burn the midnight oil），我需要个不错成绩。

Right.I heard you've been pulling all-nighters with middle earth barbie.

对 我听说你通宵和 中土大陆娃娃夜战。

In night-fighting, then, make much use of signal-fires and drums, and in fighting by day, of flags and banners, as a means of influencing the ears and eyes of your army.

故夜战多金鼓，昼战多旌旗，所以变人之耳目也。