undulation

汉语翻译

英语解释：

名词 undulation:

1. an undulating curve
   同义词：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
   同义词：wave

例句：

1. The downs fell in gentle undulations to the sea.
   这块丘陵地略带倾斜伸向大海。