HINTS:

十以上数字、年份、百分率、金额等都用阿拉伯数字表示，数字采用千位逗号隔断



Niagara Gorge looks like the track eaten into an apple by a worm. Niagara differs from the waterfalls you find in mountains, where a thin stream of water comes down a mountainside, half-flying. Some of them are much higher than Niagara, and perhaps more beautiful, but they lack mass and cutting power. Niagara belongs to the heavyweights, where a whole solid river plunges bodily over a cliff. The real sight from above is the gigantic movement of the falls themselves, digging the gorge. The falls are still moving today. However, our century has tamed it a bit. A lot of water that used to plunge down now goes through the electric power stations, both American and Canadian.
尼亚加拉峡谷看上去像是虫子在苹果上咬出来的斑痕。 尼亚加拉瀑布与人们在山上看到的瀑布有所不同。在山上看到的瀑布是一条飞下山腰的细流；有的高于尼亚加拉瀑布，也许比它美丽，但它们却没有尼亚加拉瀑布的那种气势和爆发力。尼亚加拉瀑布属于重量级--一股巨流全部从悬崖上冲泻下来。 从上往下看到的现实景像是瀑布自身的强烈运动在凿峡谷。　　 今天，瀑布依然一泻千里。不过，本世纪人们开始利用它了。过去常常向下冲击的河流，现在都流过美国和加拿大的发电站。