Sea butterfly: a swimming predatory Marine sea snail. They have two wing-like outgrowths (lower right) derived from their foot, which they continually flap to swim through the water.
海蝴蝶：一只正在游动的食肉性海蜗牛。它们拥有像翅膀一样的由足进化而来的侧翼(位于右下方)，并靠拍打侧翼在水中前行。
The flap or slat drive system in the aircraft according to claim 24, wherein said first and second high-lift device groups are located on a same wing among said two wings.
皮瓣或金属板驱动系统在飞机按照要求24个，其中说，第一届和第二届高扬程设备集团设在同一间翼说，两个翅膀。
The wing withstands vertical bending, chordwise bending and torsional deformations, and the rotor blade is considered to be capable of rigidly withstanding one order flap and lag motions.
机翼承受垂向弯曲、弦向弯曲和扭转变形，螺旋桨旋翼的桨叶认为是刚性的并承受一阶挥舞和摆振。
应用推荐