名词钟摆; （丝带、头发等的）一束; （孩童或女子的）短发; 跳跃舞（一种苏格兰民间舞）

动词突然出现

ph.

1. I haven't seen him around for a while, but I'm sure he'll bob up again soon.
我有一段日子没见着他了，可我相信过不了多久他又会突然露面的。

1. 突然出现：bob up like a cork 东山再起 | bob up 突然出现 | bob wig 法官假发

verb

1. originate or come into being

e.g. a question arose

Synonym: arisecome up