bounce up and down

基本解释

Even though, the boy liked to bounce up and down.
尽管如此，男孩还是喜欢上下弹跳。
A raisin dropped in a glass of fresh champagne will bounce up and down continuously from the bottom of the glass to the top.
一粒葡萄干落入一杯新酿的香摈中时，它会从杯底到杯口不断地上下跳动。
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And while people watching the values of their 401(k)s bounce up and down the last few weeks might doubt it, this is a profoundly positive story for the American economy, in particular.
然而，过去几周观看着自己养老金数目变动的人们也许会对此表示怀疑，特别是关于这将对美国经济具有积极作用的观点。

"The ones that are large, dark or old--they're dead, " he says, watching two pit bulls bounce up and down.
FORBES: Magazine Article
But, for example, whereas market-risk models can be tested every day as markets bounce up and down, credit-risk models have to be tested over the economic cycle.
ECONOMIST: Banking regulation
And when they do, they bounce up or down, and then what used to be the ceiling becomes the floor.
FORBES: 5 Stocks to Get Defensive in This Market