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)
恒星
英语祝大家：Merry Christmas ！
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