鸟翼

This study is concentrated on the analysis of bird-strike resistance for a wing slat, through a numerical simulation by using commercial nonlinear finite element code PAM-CRASH.

本文以机翼前缘缝翼结构为研究对象，通过大型非线性有限元分析软件PAM-CRASH，开展了飞机结构的抗鸟撞仿真设计研究。

Short-legged flightless birds of cold southern esp.

寒冷的南部特别是南极地区的短腿并不能飞翔的鸟，蹼足、鳍状翼。

Induced drag occurs when the air flow separates from the surface of a wing, while friction drag is due to the friction between the air and bird moving through the air.

诱导拖动发生时，气流分离，从表面的一翼，而摩擦拖曳是由于摩擦之间的空气和鸟移动通过空气。

Adults have black crowns, reddish-brown faces and necks, dark reddish-brown underparts with fine streaks, and black wings.

成鸟有黑冠、面孔和脖子为红棕色，背部为黑暗的红棕色，腹部有细条纹，翼黑。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。