Affix using one of the crank arm fixing bolts.

词缀使用其中的一个曲柄臂固定螺栓。

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And then starting to turn the crank on the algebra.

然后开始代数变换。

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And then we can write, if we turn the crank, we get an equation that looks like this.

我们可以这么写，得到这样子的形式。

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The first way is just to turn the crank on the math, and the second way is to do a little bit more imaginative about the process.

第一个方法就是纯数学推导,第二个方法我们将对,这个过程做一些物理图像的想象。

麻省理工公开课 - 热力学与动力学课程节选

OK, let's just turn the crank on the maths.

好，让我们开始数学推导。

麻省理工公开课 - 热力学与动力学课程节选

And we certainly don't think that in fact most of us are in the position to actually crank out any kind of accurate number.

我们当然不会认为,多数人都能,得出更准确的数字。

耶鲁公开课 - 死亡课程节选

Yet the efficiency cornucopia is the manual model: You have to turn the crank.

FORBES: Magazine Article

It survived 250, 000 rotations of the crank arm, what would come with about a decade of heavy use.

FORBES: Spinning Wheels

The crank-handle drives a dynamo through a clever transmission system, and the resulting electrical energy goes straight into a rechargeable battery.

ECONOMIST: MONITOR