Close Comrade-in-arms亲密战友
Close-In Couples贴心夫妻
close-in rig海上加油装具
close-in aircraft直接支援飞机
close-in launching近距发射;详细翻译
close-in defense近程防御
close-in testing密闭测试
close-in fighting近距离作战
PHRASAL VERB（动词词组） If a group of people close in on a person or place, they come nearer and nearer to them and gradually surround them. 包围
Hitler himself committed suicide as Soviet forces were closing in on Berlin.
当苏联军队包围柏林时，希特勒自杀了。