| 单词 | undulation |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔groundswell〕A broad, deep undulation of the ocean, often caused by a distant storm or an earthquake.暴涌：海洋中通常由远方飓风或地震引起的范围广而深的震动美国传统〔ripple〕To cause to form small waves or undulations.使起涟漪，使起波纹：使形成小波浪或起伏美国传统〔ripple〕To flow with such undulations or waves on the surface.起伏前进：表面上有这种起伏或者波浪的流动美国传统〔ripple〕To form or display little undulations or waves on the surface, as disturbed water does.成波浪状；起涟漪：在表面形成或表现出起伏或波浪，如被搅动的水形成的美国传统 |
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