The total work that we can get out must be zero, out of the two engines.

我们可以从这两个引擎得到的总功一定是零。

youdao

What I want to do is making a new engine that really just consists of two engines, side by side.

我想制造一个新引擎，它实际上是由两个引擎并排组成的。

youdao

The helicopter crash landed when one of its two engines cut out.

直升飞机两个发动机中的一个突然熄火时，直升机撞地着陆。

《柯林斯英汉双解大词典》

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

Take a 20 kilometers-per-liter hybrid, which is a small car with two engines--one gasoline, one electric--that work in collaboration.

FORBES: Magazine Article

The Airbus A320 NEO will be a premium version offered with a choice of two engines boasting new technology.

ECONOMIST: Airbus plays the new-engine card

He said one of the plane's two engines was recovered outside the pond, but most of the plane is still submerged.

WSJ: Search for pilot of NY Angel Flight resumes