雅思小作文描述趋势的常用词　　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.
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, 　　稳定: 　　level out, even out, remain stable/still/steady, stay constant, 　　keep its stability, remain unchanged.
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　　significantly, markedly, surprisingly, noticeably, substantially.
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　　平稳地: 　　steadily, smoothly, slowly, marginally, gradually, moderately, mildly.
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　　波动: 　　fluctuate, witness/display/demonstrate a fluctuation, 　　go ups and downs, increase with fluctuation