There is no acceleration in the y direction, only in x direction when it starts moving, and that's why we split it.
在y方向上没有加速度，只有在x方向上移动时才有，这就是分解它的原因。
When we have not seen enough, here again it was Shouting: Look, the trees are split mouth smile pineal miles, gently tell us that autumn came.
还没等我们看够，这边又有人喊：瞧，树上的松果正裂开嘴笑哩，轻轻告诉我们秋来了。
When we have not seen enough, here again it was Shouting: Look, the trees are split mouth smile pineal miles, gently tell us that autumn came.
还没等我们看够，这边又有人喊：瞧，树上的松果正裂开嘴笑哩，轻轻告诉我们秋来了。
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