If such an earthquake happened today, it would be felt from the Rocky Mountains to the Atlantic Ocean and would flatten most of the cities in the Mississippi valley.
如果今天发生这样的地震,从落基山脉到大西洋都会有震感,而且会把密西西比河谷的大部分城市夷为平地。
3
If a 100-foot-wide asteroid hit Earth, the shock wave from its explosion in the atmosphere could flatten trees and kill every large animal for hundreds of square miles.