swing-wing

n (aircraft with a) type of wing that can be moved forward for landing, etc and backward for high-speed flying 可变後掠翼（飞机）.

swiftness, swig, swill, swim, swim-suit, swimmer, swimming, swimming-bath, swimming-pool, swimming-trunks, swimmingly, swindle, swindler, swine, swine-fever, swing, swing bridge, swing shift, swing-boat, swing-door, swingeing, swipe, swirl, swish, Swiss, Swiss chard, Swiss roll, switch, switch off, switch on, switch-blade, switch-man, switch-over, switch-yard, switchback, switchboard, switched-on, Switzerland, swivel, swizz,