yo-yo
英['j?uj?u]
美
- n. 溜溜球（一種線軸般的玩具）；優(yōu)柔寡斷
- adj. 上下起落的；搖擺不定的
- vi. 搖擺不定；上下起落
英英釋意
- 1. a toy consisting of a spool that is reeled up and down on a string by motions of the hand
