A cubic kilometer of seawater, go into the ocean and imagine a box .

一千立方米的海水，想象一下一个体积为一千立方米的盒子。

麻省理工公开课 - 固态化学导论课程节选

You get that out of 1 cubic kilometer of seawater.

你能从一千立方米海水中得到这么多。

麻省理工公开课 - 固态化学导论课程节选

The reason--unless you can take about eight hours to do it--because, the way you're going to do it is you're going to take a train that goes one hour and fifty-eight minutes to Paris, and then you're going to take another train that zips down here in about four hours to Bordeaux, but you're paying by kilometer.

除非你想坐八个小时的火车,因为,你要走的路是,坐上火车,先花一小时五十八分钟去巴黎,然后以很快的速度用四小时到这儿,波尔多,按公里计费

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