undulating
US /ˈʌn.djʊ.leɪ.tɪŋ/
动词
1.
起伏不定
to have a continuous up and down shape or movement, like waves on the sea:
示例:
•
The road undulates for five miles before a steep climb.
在 Lingoland 学习这个单词
起伏不定
to have a continuous up and down shape or movement, like waves on the sea: