形容词中文翻译
中文翻译：无法攻克的
同义词：
['invincible', 'impregnable']
例句：
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1.The fortress was unconquerable, even with the best of efforts.
这座堡垒坚不可摧，即使用尽了所有努力也难以攻克。
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2. The mountain range is unconquerable, making it a challenging destination for climbers.
山脉连绵不绝，对登山者来说是一个充满挑战的目标。
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3. The enemy's forces were unconquerable, and our troops had to retreat.
敌军力量强大，我军不得不撤退。