1. 起伏现象：fluctuation noise 起伏噪声 | fluctuations 起伏现象 | fluid free vacuum 无油真空

2. 大涨大落：floor price 最低限价 | fluctuations 大涨大落 | follow-up investment 后续投资

3. 变动：flexibility柔性 | fluctuations变动 | focus焦点