她把发型换成了波波头，以求焕然一新。

She changed her hairstyle to a ___bob ___cut for a fresh look.

孩子们在泳池里上下漂浮，玩得很开心。

The kids were happily ___bobbing up and down in the pool.

钓鱼浮标在水面上轻轻上下跳动。

The fishing float made a tiny ___bob on the water's surface.

她把一颗糖球放进了杯子里。

She dropped a ___blob of candy into the cup.