上下: and -- one of the six catego ...机翼: wings of an aeroplane side; ...间隔: interval; space; spacing; bl ...机翼间隔: separation of aerofoil放下机翼飞行: wing-down flight机翼与旋翼间的升力分布: wing-rotor lift distribution航站大楼上下机走廊桥: finger下机: disembarkation; enplane翼间的: interplane翼间窝: interpterygoid cavity; interpterygoid vacuity机翼: [航空] wing; wing unit; aerofoil; airfoil下机房: machine room lower下机架: lower bearing bracket下机壳: lower cover上下: 1.(职务、辈分上的高低) high and low; old and young 举国上下 the whole nation; 全家上上下下都很高兴。 all members of the family, old and young, are very pleased.2.(从上到下) from top to bottom; up and down 这个水塔上下有五十米。 the water tower is fifty metres high.3.(从高到低或从低到高) go up and down 摩天楼里有电梯, 上下很方便。 with an elevator in the skyscraper, we can easily go up and down.4.(程度高低) relative superiority or inferiority 不相上下 equally matched; about the same; 难分上下 hard to tell which is better5.(用在数量词后面) about; or so; or thereabouts 三十岁上下 about thirty years old; thirty or so水翼间宽度: breadth over foils翼间副翼: interplane aileron翼间角, 螺距角: angle of pitch翼间支架: cabane间隔: interval; space; spacing; blanking; blank; region; distance; gap; intermission 留间隔 space out; 间隔五米 an interval of five metres; 有一天时间的间隔 with an interval of one day; 没有间隔 without interval; 火车每间隔 15分钟开一班。 trains are running at 15 minute intervals. 写字的时候, 字与字之间要有均匀的间隔。 space your words evenly when you write稳定翼间幅宽: breadth between the stabilizing fins地下机场: underground airdrop; underground airport地下机库: underground hangar地下机械室: machine cavern井下机铲: underground shovel