Example: to fly forward, the back-propellor has to turn faster.
例如:想要往前飞,后面的推进器必须转得更快。
When the car rounds a curve, the outer wheel must turn faster than the inner wheel.
当汽车转弯时,外侧车轮就必须比内侧车轮转的更快。
Certain gears allow one wheel to turn faster than the other wheel when the vehicle is turning a corner.
当车辆转弯时,齿轮使得一侧车轮比另一侧车轮旋转得更快。
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