Single sliding plug door and double leaves sliding door are the representatives of automatic door system of ur ban rail vehicles.
单翼塞拉门和双翼对开门是城市轨道车辆自动门系统的典型结构,文章对其工作原理、结构性能、控制方式等方面进行了阐述。
Experimental investigation on the unsteady aerodynamic characteristics of biplane MAV in horizontal gust
双翼微型飞行器水平阵风响应实验研究
two-winged flies esp. the housefly.
双翼苍蝇特别是家蝇。
Her first plane had two sets of wings, a bi-plane.
她的第一架飞机有两组机翼，是一架双翼飞机。
This bird's wings enable it to fly very fast.
这只鸟强劲的双翼使它能够飞得很快。
After waiting some time, the bird stood up and spread its wings.
等了片刻后，大鸟站了起来，伸展双翼。
Material to cover the glider's wing.
覆盖滑翔机双翼表面的材料
Love and desire are the spirit's wings to greet deeds.
爱和愿望是飞向壮举的灵魂双翼。
Great ideas need landing gear as well as wings.
伟大的思想需要起落架，也需要双翼。
A Pair of Wings on Teacher s Moral Construction-- Strengthen the Self-discipline and Improve its Quality;
师德建设的双翼——强化自律 提高素质
Self-evaluation and Self-supervision:Double Wings for University Strategic Planning
自我评估与监控:大学战略规划的双翼
Two-winged species have only the pectoral fins enlarged; four-winged species have Both the pectoral and the pelvic fins enlarged.
有些种类具双翼而仅胸鳍较大,有些则有四翼,胸、腹鳍皆大。
with out spread arms [wings] = with arms [wings] outspre ad
以张开的双臂 [翼]
tandem rotors helicopter
纵列式双旋翼直升机
intermeshing-rotor helicopter
交叉双旋翼式直升机
He laid the shoes carefully on the windowsill to display them.
他小心翼翼地把这双鞋放在窗台上展示。
She cupped her hands carefully around the flame and gazed into the light.
她小心翼翼地用双手围住火焰，并且凝视着火光。
A folding section, as of a double door or of a movable partition.
门翼，屏翼如双层门或活动隔板的褶叠部分
Her eyes grew large, her nostrils dilated, and her lips blanched.
她双目圆睁，鼻翼扩大，嘴唇泛白。
The couple helped each other, like a pair of lovebirds flying side by side.
夫妻双方互相帮助，比翼齐飞。