因为只要他相信他必须在沉到谷底后才能到达顶峰，他的生命就会像做过山车一样，晕头转向。
For as long as he believes that he must plunge to the bottom after soaring to the top, his life will be a dizzy roller-coaster ride.
尽管经济的增长是线性的但是我们可以观察到，经济趋势就像过山车，到达顶峰后，突然降到谷底。
Although the growth of an economy is linear but it is noticed that the economy trend is like a roller-coaster, reaching a pinnacle and dipping down to the trough.
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