25.to hold the field or to keep the field坚守阵地
As darkness fell, the British held the field.暮色降临, 英军坚守着阵地。
26.in the field【军】在战场
Politicians need to leave day-to-day decisions to commanders in the field.政治家需将日常决策权交给战地指挥官。
(in natural environment)在实地；在野外
The zoo is doing major conservation work, both in captivity and in the field.无论在圈养场还是在野外, 动物园在动物保护方面都承担着主要的工作。