单词：secondary wave
secondary wave的用法和样例：
例句
- Successive positions of the wave front are then given by the envelopes of the secondary waves.因此波前的相继位置即为次波的包络面。
- Furthermore, the non-dimensional propagation speed of an ISW declines and the dissipation of wave energy increases as the blockage parameter increases.随无因次障碍参数的增大，无因次波速减小，而内波的能量消散增大。
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