名词
中文翻译：围攻
同义词：
['encircle', 'blockade', 'siege']
例句：
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1. The city was besieged by the enemy for three months.
这个城市被敌人围攻了三个月。
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2. The soldiers were ordered to blockade the river and prevent the enemy from crossing.
士兵们被命令封锁这条河，阻止敌人过河。
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3. The castle was taken by surprise during a sudden siege.
城堡在一次突然的围攻中被占领。