| 释义 |
●ˌup and ˈdown🔑 moving upwards and downwards 起伏；上下波动◆The boat bobbed up and down on the water. 小船在水面颠簸。🔑 in one direction and then in the opposite direction 来回；往复◆She was pacing up and down in front of her desk. 她在办公桌前踱来踱去。sometimes good and sometimes bad 时好时坏◆My relationship with him was up and down. 我跟他的关系忽冷忽热。(NAmE, informal) if you swear up and down that sth is true, you say that it is definitely true 绝对地；肯定地；完全地 See also up |