fieldwork

名词 fieldwork:

1. a temporary fortification built by troops in the field

1. In those days they could not spare the children from fieldwork.
   那时候，孩子不到地里干活是不行的。

field.work

n.（名词）
A temporary military fortification erected in the field.
野战工事：在野外设置的临时军事防御工事
Work done or firsthand observations made in the field as opposed to that done or observed in a controlled environment.
现场工作：在实地所做的工作或获得的第一手观察资料，与在可控环境下做的或观察到的东西相对
The collecting of sociological or anthropological data in the field.
野外考察：野外社会学或人类学事实资料的收集

【引伸】
field.work.er
n.（名词）