形容词
中文翻译：未受攻击的
同义词：
['unmolested', 'untouched', 'unscathed']
例句：
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1.The castle was unassailable until the night of the attack.
城堡在袭击之夜之前是坚不可摧的。
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2.The forest was unassailable by the invaders.
森林没有被入侵者攻破。
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3.The ship was unassailable by the storm.
这艘船没有被风暴击垮。