Counter at a high speed 高速计数器
at a high speed 以很大的速度
walking at a high speed 说他们有很快的速度
move at a high speed 高速运行
If you've got a good car that can go at a high speed, then it's really nice to do that.
如果你的车很好，引擎驱动力充足，那么高速驾驶的感觉会很好。
A heavy object, like a football player moving at a high speed, has a lot of momentum—that is, once he is moving, it is hard to change his state of motion.
一个重物有很大的动量，也就是说，比如一位高速移动的足球运动员一旦运动起来，就很难改变运动状态。
A sudden stop can be a very frightening experience, especially if you are travelling at high speed.
突然停车是一种非常可怕的经历，尤其是当你正以高速行驶时。
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