impregnable的英语例句
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In those impregnable mountains, the guerrillas could hold out for years.
在那些易守难攻的大山里,游击队可以坚持很多年。
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The old Dutch fort with its thick high walls looks virtually impregnable.
古老的荷兰城堡城墙又厚又高,看起来几乎固若金汤。
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The Bundesbank's seemingly impregnable position has begun to weaken.
德意志联邦银行看似不可撼动的地位开始削弱了。
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