I could have made dust clouds at that gravel pit for the rest of my life and been happy.
我也许可以在尘土飞扬的赛车场上幸福快乐地度过我的余生了。
If it had hit the Earth, it would have made a crater 100 miles across and thrown up an immense cloud of dust.
如果它撞上了地球,就会砸出一个100英里宽的大坑并扬起巨大的尘埃云团。
At one time it was thought that these matrix grains might be pristine nebular dust, the sort of stuff from which chondrules and inclusions were made.
曾经有人认为,这些基质颗粒可能是原始的星云尘埃,即形成陨石球粒及其内含物的物质。
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