the crank slide 曲柄滑块
The Crank Handle 手摇曲柄
deflection of the crank shaft 曲轴拐档差
the crank-slide 曲柄滑块机构
The crank shaft is damaged 曲轴损坏
rotary direction of the crank 曲柄转向
to crank the gear down 摆动放下起落架
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。
OK, let's just turn the crank on the maths.
好,让我们开始数学推导。
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。
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