The Dutch have been fighting the rising and falling tides for centuries, building dikes and pumping water out of areas that are below sea level.

荷兰人几个世纪以来一直在不断地与大自然的潮涨潮落相抗争，不停地筑堤挖渠，将积水从低于海平面的地区抽走。

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So, Cohen explains, ships fill massive onboard ballast tanks by pumping seawater in at one port and pumping it out at the next.

所以，Cohen解释道，轮船需要在一个港口把海水泵进巨大的压舱水柜，然后在下一个港口再泵出去。

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The biggest concern of pumping out water from this deep is the gradual settling down of the land surface.

从这么深的地方抽水，最大的问题是地表会逐渐下沉。

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