Based on previous fossil finds , paleontologists had estimated the largest pterosaur wingspans to be around 33ft , making it the largest ever animal to fly 根据先前发现的化石，古生物学家原本估计，体型最大的翼龙的翼展可能在33英?左右，荣登有史以来最大的飞翔动物的宝座。
He didn ' t know why , for instance , but when he flew at altitudes less than half his wingspan above the water , he could stay in the air longer , with less effort 他（好像是说乔纳丹他爸）不知道这是因为什莫，比如说，当他以离水面小于半个翼展的高度飞行时，他能够更轻松的在天上停留更长时间。
Iraq could use these small uavs which have a wingspan of only a few meters to deliver biological agents to its neighbors or if transported , to other countries , including the united states 伊拉克能够使用翼展仅为数米的小型无人机向其邻国投放生物战药剂，如果可以，他还将向其他国家发动此类进攻，其中包括美国。
The main technological characteristics include not only the integrated optimizing design of variable speed and constant frequency , ensuring the wind turbines to adapt to diversified wind plants with different temperatures and geographical conditions , but also the maximum wind power captured at optimized tip speed ratio below the rated wind speed and security protection of constant power output above the rated wind speed by variable pitch regulation 主要技术特点是整体综合优化设计、变速恒频运行、适合不同气候特点和地理环境的风电场；风机全翼展变浆距功率调节、额定风速以下最佳变速比运行最大风能捕获、额定风速以上恒功率输出具有安全保护功能。
In this thesis , finite volume method and dual - time stepping method are employed to solve the 3 - d unsteady euler equations . the unsteady flow field around a finite - span flapping wing is simulated . the lift and thrust of the flapping wing for different cases are calculated 本文运用有限体积法结合双时间推进技术求解三维非定常欧拉方程，模拟了有限翼展机翼在同时具有上下拍动和俯仰运动状态下的非定常流场，计算了不同状态下扑翼的升力及推力，分析了各个影响因素对扑翼气动特性的影响。
