secondary wave的用法和樣例：
例句
- Successive positions of the wave front are then given by the envelopes of the secondary waves.
因此波前的相繼位置即為次波的包絡面。 - Furthermore, the non-dimensional propagation speed of an ISW declines and the dissipation of wave energy increases as the blockage parameter increases.
隨無因次障礙參數的增大，無因次波速減小，而內波的能量消散增大。
