That means it is easier for planes with only two engines to strike a flock of birds and lose power in both engines.

VOA: special.2009.04.01

So, what I want to do is make a new engine which really just consists of two engines, side by side.

我们先构造一个,由两个热机组成的热机，并排排列。

麻省理工公开课 - 热力学与动力学课程节选