周期性波动 periodic fluctuation
非周期性速度波动 [机] aperiodic speed fluctuation
周期波动 cyclical swings ; cyclical fluctuation ; cyclic swing
壹周立波秀 MR ZHOU LIVE SHOW
高周波功率 HF power
波峰周期 Peak period
周立波 Libo Zhou ; Zhou Li-bo
高周波 High Frequency
波茨南国际时装周 POZNAN FASHION DAYS
波动周期 cycle of fluctuation ; fluctuation cycle
最近一个周期中，M82的重力增强了M81周围密度波的脉动，导致M81的旋臂更浓密。
Last go-round, M82's gravity likely raised density waves rippling around M81, resulting in the richness of M81's spiral arms.
“一周送三次花，体贴又有风度。”波琳娜的母亲说。
"Three bouquets in one week. It's a very refined and thoughtful gesture," Polina's mother said.
2011年马德里时装周上，模特们展示西班牙设计师赫苏斯·德尔波索的作品。
Models present creation by Spanish designer Jesus del Pozo during Madrid Fashion Week 2011 in Madrid.
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