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And therefore, when you let it go the balloon will go in this direction which is the basic idea behind the rocket.
此时放手,气球会向此方向飞出,火箭就是照这个思路设计出来的。
youdao
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And therefore, when you let it go the balloon will go in this direction which is the basic idea behind the rocket.
此时放手,气球会向此方向飞出,火箭就是照这个思路设计出来的。
youdao