单词：planetary wave
planetary wave的用法和样例：
例句
- Short wave lengths correspond with high frequencies,and long wave lengths to low frequencies.短波波长和高频相对应，长波波长与低频相对应。
- As a qualitative analysis,finite element method gets a more satisfactory result in describing the propagation of the long wave of open channel unconstant flow.作为一种定性分析，有限单元法对描述明渠非恒定流长波的传播给出了满意的结果。
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