undulation
US /ˌʌn.djʊˈleɪ.ʃən/
UK /ˌʌn.djʊˈleɪ.ʃən/
명사
파동
a continuous up and down shape or movement, like waves on the sea:
예시:
•
The fields rise and fall in gentle undulations.
파동
a continuous up and down shape or movement, like waves on the sea: