dip to
-eg: The stock market dipped to a very low level during the day Friday.;
plunge/plumment/slump-eg: The temperature plunged to zero last night.;
fluctuation/wave/ebb and flow/variation
-eg: The market stead after last weeks fluctuation.
上一篇： 雅思写作范文：学得深还是学得广
下一篇： 雅思写作常用词汇：不一致/不分伯仲