pre-trenching

To tunnel under(the earth or a surface feature.

挖沟在（土地或表层）之下挖沟

To make or cut channels in.

在…挖沟，在…上开筑水道

ditch the land to drain it.

在陆地上挖沟渠来排水。

endless chain trench excavator

循环链式多斗挖沟机

sewerage dredger

(敷设污水管用的)挖沟机

The ditch digger went back to his hole. His friend asked, "What did he say?"

挖沟人回到沟里。他的朋友便问：“他怎么说？”

He dug ditches during the week and on Weekend he and Grandma dug a garden to grow some of their own food.

在平时他挖沟渠,周末和奶奶在花园里挖挖锄锄,种点自己的粮食。

They dig trench to keep the forest fire from spread

他们挖沟以阻止森林大火蔓延

They dug trenches to keep the forest fire from spreading.

他们挖沟以阻止森林大火蔓延。

To make(a tunnel) by digging.

挖出通过挖掘而挖成（沟）

a laborer who digs ditches.

挖掘沟渠壕沟的劳工。

a spade with a long handle for digging narrow ditches.

挖窄沟用的长把的铁锹。

They toiled all day digging the trench.

他们整天艰苦地挖壕沟。

rotary drain cutter

旋转式排水沟挖掘机

We must dig a trench to drain away the water.

我们必须挖一条沟排水。

To dig or make a long narrow trench or furrow in.

挖或筑狭长的沟渠或细沟.

To form(a furrow, for example) with a plow.

用犁挖（畦）用一个犁挖出（如一条槽沟）

a pile of dirt beside a newly-dug trench

在新挖的沟渠旁的一堆土.