What happened, apparently, is during the first bounce, somewhere, we hit the edge of a crater with one of the legs of the lander, and the rotation velocity of the lander changed.
发生了什么呢？ 很显然是在第一次反弹期间， 着陆器的一条腿在某个地方 碰到了一个坑的边缘， 然后着陆器的旋转速度被改变了。