名词
中文翻译：野战工事同义词
同义词：
['camping shelter', 'field fortification', 'field fortress']
例句：
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1. The soldiers dug a deep pit to protect themselves from the enemy's attack.
士兵们挖了一个深坑来保护自己免受敌人的攻击。
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2. The campers set up their tents in the open field as a temporary shelter.
露营者在开阔的田野里搭建帐篷作为临时避难所。
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3. The field fortress was built with strong walls and towers to defend against an enemy invasion.
这个野外堡垒用坚固的墙壁和塔楼建造，以抵御敌人的入侵。