形容词
中文翻译：无防御的
同义词：
['unprotected', 'unarmed']
例句：
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1. The soldiers were defenceless against the enemy's attack.
士兵们在敌人的攻击下毫无防备。
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2. The forest was defenceless against the raging fire.
森林在肆虐的大火面前毫无抵抗之力。
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3. The village was defenceless against the flood.
这个村庄在洪水面前毫无防备。