up-and-down
音标['ʌpən'daun]
汉语翻译
a. 一上一下的, 时起时伏的
英语解释
副词 up-and-down:
- moving backward and forward along a given course同义词：up and down
- alternately upward and downward同义词：up and down
0
纠错
英汉推荐
