上升动词类: increase, go up, rise up, grow up, jump up, surge, shoot up, keep an upward tendency

　　下降动词类: decrease, go down, decline, fall down, drop, sink, dip, keep a downward tendency

　　波动动词类: fluctuate

　　持平动词类: remain the same, stabilize, remain stable, remain constant

　　修饰动词的副词: slightly 轻微地, slowly 缓慢地, gradually 逐渐地, steadily 稳定地, rapidly 迅速地, moderately 温和地, 轻微地, significantly 明显地, sharply 明显地, dramatically急剧地, drastically 急剧地

　　上升名词类: increase, rise, growth, jump, surge

　　下降名词类: decrease, decline, fall, reduction, drop

　　波动名词类: fluctuation

　　修饰名词的形容词: slight, slow, gradual, steady, rapid, moderate, significant, sharp, dramatic, drastic

　　2、极值类词汇和表达

　　较高点: reach the peak/top/highest point

　　Increase to the peak/top/highest point(所有上升类的动词都可以替换掉increase)

　　较低点: reach the bottom/lowest point

　　drop to the bottom/lowest point(所有下降类的动词都可以替换掉drop)

　　占的较多: occupy/make up/take up/account for the largest proportion/number/percentage of …

　　占的较少: occupy/make up/take up/account for the smallest proportion/number/percentage of…

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