動詞 bob up:

1. originate or come into being
   同義詞：arise, come up

1. I have not seen him around for a while, but I am sure he'll bob up again soon.
   我有一段日子沒見著他了，可我相信過不了多久他又會突然露面的。
2. She dive below the surface, then bob up like a cork again a few second later.
   她潛入水中，幾秒鐘後像軟木塞一樣又浮了上來。