According to this method of multi-polar set dynamic balancing valve design concept is wrong.

而按照这一方法多极设置动态平衡阀设计概念是不对的。

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The railroad yards below me, the tracks black, webby, not ordered by the engineer but cataclysmic in design, like those gaunt fissures in the polar ice which the camera registers in degrees of black.

楼下面的调车场里，铁轨黑糊糊的，犹如蜘蛛网一样，这不是由工程师定做的，不过设计上有大起大落的变化，像极地上荒凉的冰缝，照相机却照出深浅不同的黑色。

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Thus an effective way to design the polar arc width reasonably in order to reduce torque ripple is provided.

从而为合理选择极弧宽度，达到减少电磁转矩波动的目的提供了一种有效途径。

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The use of a triple pun could be cloying in a less sophisticated execution, but here, the fact that the app is about polls between polar opposite choices and that the logo (and mascot) for the design is a polar bear is smile (not groan) inducing.

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Nasa has reacted angrily to the allegation that it knew the Mars Polar Lander (MPL) mission would fail because of a design flaw in the craft's braking thrusters.

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