水滴天天滴不停，石头最坚也磨损。

Water dropping day by day wears the hardest rock away.

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赛车轮胎通常由很软的橡胶材料组成，这使得它能从赛道上获得最大的抓地力，同时也磨损的很快。

The racing tyre is constructed from very soft rubber compounds which offer the best possible grip against the texture of the racetrack, but wear very quickly in the process.

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相比之下，一块旧手表磨损太厉害了，最后也没必要修理了。

An old watch, by contrast, becomes so worn that it eventually is not worth mending.

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