名词
中文翻译：无法克服
同义词：
['unsurmountable', 'invincible', 'impregnable']
例句：
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1. The task was so difficult that no one could have done it insuperably.
这项任务如此困难，以至于没有人能够完成。
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2. The enemy's forces were insuperably strong.
敌人的军队非常强大。
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3. The mountain was insuperably high and the climb was treacherous.
这座山非常高，攀登非常危险。