表示上升:

　　climb,  go up, ascend,  shoot up，creep up, surge, boom, accrue,

　　leap, soar,  jump,  increase,  rally,  rise,   rocket,   improve,

　　表示下降:

　　go down,  fall,  fall off, drop,  slump,  decline,  decrease,  plummet, slide,  slip,

　　shrink,  dip,  reduce,  descend, sink, subside, ebb, creep down,

　　到达顶部:

　　top out,  peak,  reach a peak,   reach the highest point,  peak at..,

　　触底:

　　bottom out, hit a trough,  reach a low point, reach the rock...

　　稳定:

　　level out,  even out,  remain stable/still/steady,  stay constant,

　　keep its stability,  remain unchanged...

　　变化急剧地:

　　dramatically,  drastically,  sharply,  hugely,  enormously, considerably,

　　significantly,  markedly,  surprisingly,  noticeably,  substantially...

　　突然地:  abruptly, suddenly

　　平稳地:

　　steadily,  smoothly,  slowly, marginally, gradually, moderately,  mildly...

　　波动:

　　fluctuate,  witness/display/demonstrate a fluctuation,

　　go ups and downs, increase with fluctuation(波动式增长)

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