“从某种意思上说，碰撞过程中产生过环形山，但是参与碰撞的物质又把它填满了。”Asphaug说到。

"In a way you do make a crater, but you fill it all in with the impactor material, " says Asphaug.

youdao

“从某种意思上说，碰撞过程中产生过环形山，但是参与碰撞的物质又把它填满了。”Asphaug说到。

"In a way you do make a crater, but you fill it all in with the impactor material, " says Asphaug.

youdao