The deposits spread for 100 kilometers across four counties.

这些矿藏绵延一百公, 跨越四个县。

Bright ejecta rays such as these are produced as impacts excavate and eject relatively unweathered subsurface material.

这些放射状石坑产生于天体撞的地下物质，绵延在遍布石坑的水星表面数百公。