- rise and fall; ups and downs; heave rolling; undulate; fluctuate 短语和例子
起伏不平的地形 a wavy terrain; 起伏的波涛 theheaving billows; 关系起伏 ebb and flow of the relations; ups and downs in the relations; 山峦起伏。 the mountain ranges rise and fall
- 波动,起伏: fluctuate v. vary from one form or state to another; fluctuation
- 大起伏: megarelief
- 等起伏: equal ripple
- 电起伏: electric fluctuation
- 起伏比: fluctuation ratio
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