He kept bouncing up and down like a yo-yo.
他像个悠悠球似的蹦蹦跳跳。
When the unicorn saw the number stuck to my side, it started bouncing up and down in excitement.
当这只独角兽看见贴在我侧面的数字时，它开始兴奋地跳上跳下。
The boy squealed in delight bouncing up and down on the bed.
这男孩高兴得尖叫，在床上蹦蹦跳跳。
"I love you as high as I can hop!" laughed Little Nut-brown Hare, bouncing up and down.
“我爱你，有我跳得那么高。”栗色的小兔子哈哈大笑，它跳上又跳下。
You know, if it had been bouncing up and down as we went, then we'd say, jeez, no trend here.
你知道如果像上次一样，图线又上又下的话，我们会说，天呐，没有规律。
We see small children 25 bouncing up and down and 26 hollering with joy on the rope walkway.
我们看见小孩们上下蹦跳，在绳索走道上欢乐地叫喊。
He was very excited and bouncing up and down, trying to sniff everything in this new environment.
小狗很兴奋，蹦蹦跳跳，试图嗅新环境里的每一件东西。
If the shock absorbers are in good shape, the car should rebound just once or twice and not keep bouncing up and down.
如果减震状况良好，汽车应该只是弹回一次或两次，就不再继续上下地反弹了。
These films can be used to make a new type of loudspeaker that works by heating and cooling the air, rather than bouncing up and down to vibrate the air directly.
这样制成的薄膜可以被用来制造一种新型扩音器，这种扩音器通过加热和冷却空气工作，而不再是直接通过往复运动使空气产生振动效果。
Although seemingly defenceless, it is capable of simply flinging itself from its perch, curling up into a ball and bouncing off boulders and down steep slopes to safety.
虽然看上去无法自卫，它却可以从栖息的高位简单的将自己投掷出去，卷成一团在大卵石之间弹来弹去滚下险峻的斜坡抵达安全地带。
See the shuttlecock jumping up and down, like a child, bouncing around naughty, but played no five it broke.
只见那毽子上窜下跳，像个孩子似的，调皮的蹦来蹦去，只是踢了没有五个就坏了。
See the shuttlecock jumping up and down, like a child, bouncing around naughty, but played no five it broke.
只见那毽子上窜下跳，像个孩子似的，调皮的蹦来蹦去，只是踢了没有五个就坏了。
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