Last week , the army corps of engineers exploded a three-kilometer-wide hole along an earthen levee in missouri .
上周，美国陆军工兵部队在密苏里州的土结构防洪堤炸开一个3公里宽的口子。
We climbed to the crest of a hill up earthen stairs built into the hillside .
我们顺着建在山坡上的土阶往山顶上走。
When sufficient precipitation over extended periods of time wash small earthen particles into the lowest points in the valley , a flat surface of fine sediment can form .
当随着时间的延续，足够的降雨量将小土颗粒冲进死谷的最低点，就形成了颗粒微小沉积物的平坦表面。
In combat outposts throughout fallujah , what had once been medium-sized houses were now ringed with sandbags , earthen barriers and barbed wire .
