曲拐是大型船用发动机曲轴的重要部件。

Crank is a very important component of crankshaft in large Marine engine.

youdao

目前汽车用发动机主要有汽油机和柴油机两种。

There are two kinds of engines in use: gasoline engines and diesel engines.

youdao

船用曲轴是大型船用发动机的重要部件，而曲拐是曲轴的关键部分。

Crankshaft is a very important component of large Marine engine and its key part is crank.

youdao

I mean, you know the wings go, and the air runs, and then the motor on the engine and it's a miracle how it gets up there and that is the way I used to explain the Greeks, because I had no better idea.

我的意思是,你知道机翼的作用,空气的流动,还有引擎上的发动机,飞机能飞起来,是个奇迹,我就是用这种方式来解释希腊历史的,因为我也没有更好的方法了

耶鲁公开课 - 古希腊历史简介课程节选