And the aeronautics engineer who wants to build an airplane has to obey, take into consideration, learn it, study and understand the law of gravity.

航空航天工程师,想制造飞机，必须遵守，加以考虑，学习，研究理解万有引力定律。

哈佛公开课 - 幸福课课程节选

Imagine if an aeronautics engineer : woke up in the morning and said, "you know,the Law of Gravity thing really makes things difficult for me.

试想一下，如果一个航空工程师,在早上醒来，说，“万有引力,真的带给我很多麻烦。

哈佛公开课 - 幸福课课程节选

Aeronautics engineer takes into consideration of reality.

航空工程师必定要考虑到现实。

哈佛公开课 - 幸福课课程节选