它可以让火车在现有蜿蜒盘旋的轨道上保持匀速。
It allows the train to maintain a constant speed through the twists and turns of existing track.
他们可以匀速行走。
现在我们讲讲匀速圆周运动。
If I am an inertial observer, another person moving relative to me at constant velocity will also be an inertial observer.
如果我是惯性观察者,那另一个相对于我做匀速运动的人,也是一个惯性观察者
But things which were at rest will move at a constant velocity, opposite of the velocity that you have relative to me.
这些静止的东西都在匀速运动,方向正好跟你相对我运动的速度方向相反
You put a chunk of wood on a table and you try to move it at constant speed.
你把一大块木头放在桌子上,试着让它匀速运动
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