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【释义】：

adj．& adv．接近(的)，密集(的)，秘密(的)v．［louz］关闭，停止，结束，接近n．终止，结束

◇as close as an oyster守口如瓶close about同close around围住，包围close in包围close in on(upon)逼近close off封锁close round包围

‖close air combat近距空战close attack近距离攻击close combat肉搏战close defense近距离防御close formation密集队形close-in combat近战close-in fire近距离射击close-in missile近程导弹close-in weapon近战兵器close landing近距登陆close navigation近距导航close range firing近程射击close reconnaissance近距离侦察close tracking精确跟踪closed adj．保密的closely adv．严密地，秘密地