yo-yo
yo-yo 英 ['jəʊjəʊ] 美 [ˈjoˌjo]
n. 溜溜球（一种线轴般的玩具）；优柔寡断 adj. 上下起落的；摇摆不定的 vi. 摇摆不定；上下起落
名词复数:yo-yos
- A yo-yo is a toy that's made of a string wound around two connected discs. The trick of a yo-yo is to drop the discs to the end of the string and flick them back up into your hand.
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- n. 溜溜球（一种线轴般的玩具）；优柔寡断
- adj. 上下起落的；摇摆不定的
- vi. 摇摆不定；上下起落
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1. yo-yo diets such as this one are not only ineffective, they’re dangerous to your heart and overall health.
溜溜球减肥法，如南海滩减肥法，不仅仅没有效果，他们对你的心脏和整个健康都有危险。
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2. Because historically, people don’t stick to them, which creates a yo-yo effect, which paves the way for obesity.
因为从历史上看，人们不能坚持下去，这样会创造出摇摆不定的效果，反而为肥胖奠定了基础。
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3. He is also looking at extending his basic prototype to use multiple kites that yo-yo: when one goes up, another goes down.
他同时也在寻找自己创作原型的衍生作品，用几个风筝像溜溜球那样组合在一起： 一个飞上去，另一个降下来。
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