当他路过这些书桌时，他总是把我的书从桌上撞掉。
When he passes the desks, he often knocks my books off the desks.
当他路过时，他总是把我的书从桌上撞掉。
When he walks past the desks, he often knocks our books off the desks.
走着走着，只见一群孩子向他跑去，把他的书撞飞满地，人也被撞倒在地，眼镜飞落在十英尺远的草地上。
They ran at him, knocking all his books out of his arms and tripping him so he landed in the dirt. His glasses went flying, and I saw them land in the grass about ten feet from him.
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