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There was a sudden/rapid/dramatic/significant/sharp/steep/steady/gradual/slow/slight +increase/jump/rise/decrease/drop/fall/fluctuation +in the number of XXX from to / between and 描述稳定的data： The number of XXX remained steady/stable from to / between and The number of XXX stayed the same from to / between and There was little change / hardly any change / no change in the number of XXX from from to / between and 描述不同状态的data Noun form: steady drop / sharp rise peak / dramatic fall / sharp drop Verbal form: bottom out / reach the bottom / increase gradually / reach a plateau / remain steady 描述the highest point以及the lowest point 高点极值： The monthly prof it / The figures / The situation ... +peaked in 准确时间点用at XXX at XXX% / XXX 或者reached a peak / a high point at XXX% / XXX 低点极值： XXX bottomed out / reached +rock / the bottom / a low point 或者hit a trough 此外，在描述过程中还有很多的conjunctional words/sentences，最常用的固定搭配如下： | 
