A circular opening in an opaque screen transmits only a small circular patch of a wave surface. 不透明屏上一个圆孔仅仅透射波面的一小圆块。
The outer frequency spectra of wind waves are estimated with the time series data of wave elevation measured in the laboratory wind wave flume. 利用实验室风浪槽内测得的波面序列资料估计风浪外频谱。
The characteristic surface is essentially an acceleration front. 特征曲面实质上是一种加速度波的波阵面。
It starts with zero and grows to a maximum slightly behind the wave front. 它从零值开始，并在稍后于波阵面处增长到最大值。
