力场的旋度告诉你，角速度增加或减小的快慢。

And the curl of a force field tells you how quickly the angular velocity is going to increase or decrease. OK.

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黑碳对大气的影响会因为许多别的因素增强或减小。

The effect may be amplified, or reduced, by many factors.

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这种用户可以增加或减小虚拟服务器或存储区域块的数量。

This consumer can scale the number of virtual servers or blocks of storage area up or down.

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