1·They dig trench to keep the forest fire from spread.
他们挖沟以阻止森林大火蔓延。
2·There's something called a trench box - a metal case that holds back the sides of the walls - to be used to stop them caving in when you dig deeper than 5ft.
有一种叫做沟槽支撑的东西——一种用于挡住沟壁的金属箱体——挖土超过五英尺约1.5米时，用它来防止塌方。
3·Trench warfare is resorted to when the superior firepower of the defense compels the opposing forces to "dig in" so extensively as to sacrifice their mobility in order to gain protection.
当防守方的优势火力迫使敌方广泛“掘壕”，以牺牲机动性来获得防护力时，就会发生堑壕战。
4·From nine to eleven he planned to dig a hole, or trench, and possibly find something good to eat buried in the dirt.
九点到十一点，他打算挖一个洞，或者一条小沟也行，没准儿还能从脏土里翻出什么好吃的呢。
5·There's something called a trench box-a metal case that holds back the sides of the walls-used to stop the walls from 5 caving in when you dig deeper than 5ft.
有一种叫做沟槽的东西——一种用来阻止两面沟壁往下坍塌的金属容器——当你挖土超过5英尺(约1.52米)深时，用它来防止沟壁坍塌。
6·"You could drive up the beach and dig a trench"—like the one seen above—"and see if you get layers of orange sand, and spray [bacteria] there to eat the oil."
“你可以开车过来沙滩，挖条沟”——如上图所示——“然后看看有没有橙色的沙子，如果有就洒[细菌]下去吃石油。”
7·I forgot to dig a trench around the tent.
我忘了在帐篷四周挖一条沟。
8·Late at night, you sometimes have to fight the urge to dig a fighting trench in the the yard to sleep in.
在深夜中你有时必须忍着在院子里挖条战壕并睡在里面的冲动。
9·We must dig a trench to drain away the water.
我们必须挖一条沟排水。
10·From nine to eleven, he Wilbur planned to dig a hole, or trench, and possibly find something good to eat buried in the dirt.
从九点到十一点，它打算挖个洞或挖条沟，这样做也许能找到点埋在土里的好吃东西。