四、图表描述各种变化形式词汇总结

　　（一）表示向上：increase,rise,improve,grow,ascend,mount,aggrandize,go up,climb, take off,jump,shoot up暴涨,soar,rocket, skyrocket。

　　举例：the number of populationincreased/ascended/mounted等等。

　　（二）表示上升后保持平稳：flatten out(下降或升高后变平),level off。

　　举例：the number of students mounted and leveled off.

　　（三）表示复苏(下降后再上升)：recover,bounce back。

　　举例：the number of companies decreased andrecovered.

　　（四）表示下降：decrease,decline,descend,drop,fall,go down,come down,collapse, crash,fall off, slump, plummet,plunge, slide,shrink, dwindle, diminish。

　　举例：the number of car accidents decreased/ declined.

　　（五）表示下降后保持平稳：bottom out,flatten out（下降或升高后变平）。

　　举例：the number of population decreasedand bottomed out.

　　（六）表示稳定或水平：remain steady/constant,stay stable, stabilize, stagnate,flattenout(下降或升高后变平),level off, stay at the same level, be similar to,there is little/hardly any/no change。

　　举例：the number of population stayedstable. /the number of population remained steady.

　　（七）表示波动：fluctuate。

　　举例：the number of recruitment fluctuated.

　　（八）表示在底部：reach a low point,bottom out,reachthe bottom,reach the rock,hit a trough。

　　（九）表示在顶部：reach a peak,peak,topout,reach the highest point/ the top/the summit/ the most,peak in/at,reach the zenith。

　　举例：the number of investors peaked/reached its summit/ reached its zenith.