duad

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【词性】：n．

【释义】：

成对的东西，对，双

‖dual［′dju：l］，［′djul］adj．双的，成对的n．双座驾驶，带飞dual agent为多国服务的间谍dual-basing system双重基地制dual-control flying instruction带飞训练dual-control operational trainer复式操纵教练器dual复式操纵教练机dual ejection双座同时弹射dual firing system复式发火系统dual flying复式驾驶飞行dual ignition复式点火dual instruction带飞训练dual instruction flight带飞dual instruction time带飞时间dual-missile guidance system双弹制导系统dualmode seeker复式导引头dual-motored plane双发动机飞机dual-object electronic tracking system双目标电子跟踪系统dual-purpose aerial missile两用航空导弹dual-purpose aerial rocket两用航空火箭dual purpose gun两用炮dual purpose weapon高射平射两用武器dual radar set双雷达设备dual-role aircraft双用途飞机dual-roleradar双功能雷达dual-rotor helicopter双旋翼直升机dual-status officer兼职军官dual system of runways双跑道系统dual-thrust rocket两级推力火箭发动机dual wheel双轮dual-wheel landing gear双轮起落架dually adj．& adv．双重的duality［′djuliti］，［dju：′liti］n．dual-automatic adj．双自动的