A moving clock runs slower than a stationary one from the perspective of a stationary observer.

从固定的观察者来看运动中的表比静止的慢。

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A moving object appears to shrink in the direction of motion, as seen by a stationary observer.

固定的观察者来看运动的物体，它在运动方向上似乎会缩小。

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To the moving observer on the train, the circle of light expanded equally on all sides.

对于火车上的观察员来说，光圈是匀速向各方面扩展的。

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His explanation of relativistic time dilation, which causes fast-moving clocks to appear to be running slowly when viewed by a stationary observer, is exemplary.

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