And, the way we can get it, so, it's called usually V, so, V here stands for velocity more than for vector. And, you just get it by taking the derivative of a position vector with respect to time.

根据它的原理，我们通常用v表示,这里的V更代表速率而不是矢量，你能通过,对一个关于时间的位置向量求导得到它。

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dt If you divide both sides by dt, which mathematicians cannot do, but physicists can, then you get /dt=ds/dt d theta/dt equals ds/dt, and v/l that is the velocity divided by l.

如果两边同除以，数学家不会这么做，但是物理学家可以,得到dθ,等于。

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You can get even more details about your users by passing the -v flag, which is shown in Listing 7.

通过传递- v标记，您可以获得有关用户的更多详细资料，如清单7所示。

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Recent research, from British sources, has indicated that Hari Singh did not reach Jammu until the evening of 26 October and that, due to poor flying conditions, V P Menon was unable to get to Jammu until the morning of 27 October , by which time Indian troops were already arriving in Srinagar.

BBC: Kashmir: The origins of the dispute