People of the world, be courageous, dare to fight, defy difficulties and advance wave upon wave.
全世界人民要有勇气，敢于战斗，不怕困难，前赴后继。
Wave upon wave of Chinese visitors, in small groups and coach parties, alone and in pairs, pack the pavements and malls.
一拨又一拨的中国游客，三五成群或跟着旅行团，独自一人或成双成对，在人行道和商店里汇聚着。
Upon the basic electromagnetic theory, wave propagation equation on an axis symmetrical case is derived. Numerical simulation method for solving the partial differential wave equation is presented.
从基本电磁理论出发，推导轴对称条件下电磁波的波动方程，给出求解此类波动方程的数值仿真方法。
When a radio wave propagating in one medium impinges upon another medium having different electrical properties, the wave is partially reflected and partially transmitted.
电波在不同性质的介质交界处，会有一部分发生反射，一部分通过。
When a radio wave propagating in one medium impinges upon another medium having different electrical properties, the wave is partially reflected and partially transmitted.
电波在不同性质的介质交界处，会有一部分发生反射，一部分通过。
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