These rhythmic waves of muscular relaxation and contraction are called peristalsis.
这种肌肉舒张和收缩的有节律波动称为蠕动。
Whether grey or blue skies lay overhead, the heft of the waves was always huge - sometimes rhythmic and pleasant, at others offering a waltzer of a voyage.
无论头顶上的天空是灰色还是蓝色，海上总是波涛汹涌——有时海浪富有节奏感而令人愉悦，有时我们的船就像在海浪上跳华尔兹舞。
Neuroscientists have long known of the existence of brain waves - rhythmic fluctuations of electrical activity believed to reflect the brain's state.
神经系统科学家在很早就了解脑电波的存在——电子活动形成的有节奏的波动，被认为反映了大脑的状态。
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