r So, let's remember that the amount by which we moved, t delta r, is approximately equal to v times delta t, OK, and just using the definition of a velocity vector.
所以记住移动的量△,约等于v*△,这是用速度矢量的定义。
V struggled to remember the nightmare that she had last night. But only the panic feeling remained, but not the plot.
在努力回忆着自己头一天晚上的噩梦，可是她只记得恐怖的感觉，却忘了情节。
V struggled to remember the nightmare that she had last night. But only the panic feeling remained, but not the plot.
在努力回忆着自己头一天晚上的噩梦，可是她只记得恐怖的感觉，却忘了情节。
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