close in
柯林斯詞典
1. PHRASAL VERB If a group of people close in on a person or place, they come nearer and nearer to them and gradually surround them. 包圍
Hitler himself committed suicide as Soviet forces were closing in on Berlin. 儅囌聯(lián)軍隊包圍柏林時，希特勒自殺了。
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