It was hard to imagine how much added weight the train had taken on since we left Dar es Salaam, or whether each of the cabins had begun, like ours, to resemble the produce section of Whole Foods.

很难估算，火车从达累斯萨拉姆开出以来已经增加了多少重量。或者说，是不是每节车厢都像我们车厢一样，已经变得和食品超市一样了。

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But the weight of his magnificent train held him down.

但是他那些华丽的羽毛太重了，他飞不起来了。

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The structure of couplers should be updated continuously with the increase of train weight and speed.

车钩结构要随着列车重量和速度的提高而不断更新。

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Current designs for maglev trains rely on electromagnets, since nobody has been able to make a permanent magnet strong enough to lift the weight of a train.

ECONOMIST: Maglev trains