火箭快速飞入轨道。
球体本身并不具有进入运动状态的动力,但你一掷它,就给了它能量,这就是为什么球会快速飞入空中的道理。
A ball has no power by which it can put itself in motion but as soon as you throw it, you impart energy to it and this is why it speeds through the air.
球体本身并不具有进入运动状态的动力,但你一掷它,就给了它能量,这就是为什么球会快速飞入空中的道理。
A ball has no power by which it can put itself in motion but as soon as you throw it, you impart energy to it and this is why it speeds through the air.
应用推荐