1.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。
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。
1.[obn]上下跳动的；左右摇摆的changing repeatedly in size, amount, quality, etc. from one extreme to another
She worries about her pattern of yo-yo dieting.节食后体重反弹，再节食再反弹，她对这种模式很担心。
Although yo-yos are toys that have been around for many years, more advanced versions of the popular toy started coming about inthe 1990's.
尽管溜溜球这种玩具多年来一直都有，但是这种流行的玩意儿在20世纪90年代开始出现了更为先进的版本。
Mr. Grayson said his customers had designed parts for antique cars, yo-yos and even pieces for DNA analysis machines.
格雷森先生说，他的客户已设计了古董汽车零件、溜溜球甚至DNA分析仪的部件。
Yanking yellow yo-yos. Yanking yellow yo-yos.
猛拉黄色溜溜球。
Molly : Thanks, I dig yo-yos!
莫莉：谢谢，我喜欢悠悠！
A toy company has popularized the use of yo-yos in China.
一家玩具公司使悠悠在中国流行起来。
How many yo-yos?
有多少个悠悠球？
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