The high cost of steam and the lesser need for speed kept the majority of the world's ocean freight moving by sail until the early years of the 20th century.
蒸汽的高成本、加上货运对速度的低需求，使得世界上大多数的海运货物都是通过帆船来运输的，直到20世纪初，这一状况才有所改变。
Imagine you're on an ocean liner when a wall of water ten stories tall RACES toward you like an unstoppable freight train.
想象一下你正呆在一艘远洋轮船上，这时一道十层楼高的水墙像一列不可阻挡的货运列车冲向你。
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