机械时钟的出现意味着，尽管它可以通过调整来记录日光时，但是它本质上适合记录相等的时间。

The advent of the mechanical clock meant that although it could be adjusted to maintain temporal hours, it was naturally suited to keeping equal ones.

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第二，太阳和行星的连线，在相等的时间内扫过相等的面积。

And second, the area swept out by the line from the sun to the planet is swept at constant time.

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在回到水面后，他们必须花上在50米的水下相等的时间来减压。

When coming up to the surface, they must spend as much time decompressing as they spent under 50 meters of water.

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