1. 溜溜球,悠悠球(圓形玩具,抖動細繩時能上下移動) A yo-yo is a toy made of a round piece of wood or plastic attached to a piece of string. You play with the yo-yo by letting it rise and fall on the string.
yo-yo英英釋義
yo-yo
noun
1. a toy consisting of a spool that is reeled up and down on a string by motions of the hand