词典释义：
释义
moving upwards and downwards
一上一下，起伏
-
bouncing up and down .上下跳动。
to and fro
来来回回，往返地
-
pacing up and down in front of her desk. 在她书桌前踱来踱去。
[as prep.]to and fro along
来来回回，往返地
-
strolling up and down the corridor .在走廊上踱来踱去。
in various places throughout
到处，处处
-
in clubs up and down the country. 在全国各地俱乐部。
〈非正式〉（情绪，状态）多变的
-
my relationship with her was up and down. 我和她的关系变化不定。
