undulation

漢語翻譯

英文解釋：

名詞 undulation:

1. an undulating curve
   同義詞：wave
2. wavelike motion; a gentle rising and falling in the manner of waves
3. (physics) a movement up and down or back and forth
   同義詞：wave

例句：

1. The downs fell in gentle undulations to the sea.
   這塊丘陵地略帶傾斜伸向大海。