1.The course of life is like the sea; men come and go; tides rise and fall; and that is all of history.
人的一生如同大海：人来了又去，潮涨又潮落；这就是全部历史。
2.The first thing Freud says about the drive is, if I may put it this way, that it has no day or night, no spring or autumn, no rise and fall.
佛洛伊德提到有关驱力的第一件事是，容我这样说，驱力没有白天或夜晚，没有春天或秋天，没有升起或下降。驱力是一个持续的力量。
3.The cycle of good and bad fortune is like the rise and fall of a roller coaster: What goes up inevitably comes down.
好运-坏运的周而复始就好像过山车的上升和跌落。上去的必然要下来。
4.Furthermore, it is something of an 'uncorrelated' asset, meaning it won't necessarily rise and fall in line with everything else.
而且，它是一种“无关联”资产，也就是说，它的价格不会随着其他各种投资品的价格而波动。
5.Although the hotel business tends to rise and fall in lockstep with the wider economy, not every hotelier is equally exposed.
尽管酒店的经营和大范围经济的起伏保持一致，但不是每一个酒店经营者都暴露在经济危机中。
6.As the waves rise and fall inside the chamber, compressed air is forced in and out of the opening, past a turbine that drives a generator.
当波浪在室内起落时，就会迫使被压缩的空气进入这个细孔，从一台驱动发动机的涡轮中通过。
7.The rise and fall of the managed honeybee, then, owes as much to the economics of supply and demand as it does to the forces of nature.
蜜蜂数量的起起落落，与其说是大自然的力量还不若归之为经济供给与需求关系的变化。
8.Variations in transpiration rate present a narrow peak with steep rise and fall usually, but a wide peak for a few.
蒸腾速率变化峰型多呈陡升陡降的窄峰型，少数植物为宽峰型；
9.His words come out with a beautiful cadence, and the musical tones of the Peking accent have a graceful musical rise and fall.
他的话以一种美妙的声调表现出来，而那种北平腔的悦耳声调具有优美音乐的抑扬顿挫。
10.'Rise and fall of every man's duty', here are the responsibility of every student.
‘天下兴亡，匹夫有责’，在座的每一位同学都有责任。