悠悠球，溜溜球，摇摇（拉线使圆盘旋转着沿线上下来回移动）a toy that consists of two round pieces of plastic or wood joined together, with a piece of string wound between them. You put one end of the string around your finger and make the yo-yo go up and down.
He kept bouncing up and down like a yo-yo .
他像个悠悠球似的不停地上窜下跳。
v.
1.
[i]
(+ adv./prep.)
上下跳动；左右摇摆to change repeatedly in size, amount, quality, etc. from one extreme to another
When I was young my weight yo-yoed between 140 and 190 pounds.
我年轻时体重在 140 到 190 磅之间忽上忽下。
adj.
1.
[obn]
上下跳动的；左右摇摆的changing repeatedly in size, amount, quality, etc. from one extreme to another
