如果我们有岩石样本用于研究，我们就能知道，这些小陨石坑是在行星形成的最后阶段被撞击形成的，还是后来的流星雨造成的。
If we had rock samples to study, we'd know whether these small craters were formed by impacts during the final stages of planetary formation, or if they resulted from later meteor showers.
当我在楼下吃早餐，用汤匙舀着最后一口米粥时，洗手间里传来一声响亮的撞击声。
As I had the breakfast downstairs, a ringing clash came out from the washroom while I was dipping the last bite of porridge by the soap spoon.
另有九辆汽车的数据显示，在撞击发生前的最后一刻，刹车才被踩下。
Data from nine other vehicles showed the brakes were used only in the last moment before impact.
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