Getting enough good air to breathe became the most serious problem.

VOA: special.2009.07.22

So, all right, so now we're getting serious.

现在考虑的问题很重要了。

麻省理工公开课 - 热力学与动力学课程节选

I want to give you a heads up; you're getting some serious firepower this term.

我有言在先;,这个学期你们都需要抵挡住非常强的火力。

麻省理工公开课 - 计算机科学及编程导论课程节选