And that slight twist, which creates a double rotation effect when viewed in plan?

轻微扭曲，当你从详图视角看时，会出现一种再次旋转的效果。

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The coaxial, double inverse rotation of the centrifuging sprayer and the metal mould can make the coating more uniformly.

离心头和金属铸型的同轴反向双重旋转，使涂层更加均匀。

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YRT series cylindrical roller and thrust needle roller combined bearings, with high rotation accuracy, can support heavier radial loads, double direction axial load and inclined torque, etc.

圆柱滚子和推力滚针组合轴承yrt系列具有旋转精度高、可承受较大的径向载荷和双向轴向载荷以及大的倾覆力矩等特点。

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So it's very important to be keeping in mind that any time you see a double bond, you have a pi bond there, so you're not going to see any rotation around the bond axis.

所以你们要记住,任何时候你们看到一个双键，这里面有π键，你们不会看到关于键轴的任何转动。

麻省理工公开课 - 化学原理课程节选

The net result will be a low double-digit advance on Wall Street with a rotation in leadership from small-cap companies to blue chips.

FORBES: Two Views Of The Future

By launching closer to the equator, the rocket receives a bigger boost from the Earth's rotation, meaning it can lift nearly double the mass of a normal Baikonur payload - a maximum of three tonnes, as opposed to 1.7 tonnes, into a geosynchronous orbit 36, 000km above the Earth.

BBC: A rocket abroad - Soyuz in French Guiana

The importance of watching for sector rotation was reinforced in 2011 when many of the key sectors saw double-digit gains and losses from one quarter to another.

FORBES: 4 Industry Groups Beating the S&P 500