今年伊朗官员夸口伊朗已经研制出一种飞行半径超过1900公里的无人机。
This year Iranian officials said they had developed a new drone with a range of more than 1,900km.
亚内说，新的无人机索拉拉50将能够在地球上空近20公里的高空飞行，向420公里半径的地面提供因特网信号。它能在空中停留近5年。
He says the new drone, Solara 50, will be able to fly almost 20 kilometers above the earth, providing the Internet signal in a radius of almost 420 kilometers... and stay aloft for almost five years.
计算结果表明，粒子初始温度、半径不同，粒子参数随飞行距离的变化也不同。
The results show that the change is different with the initial parameters of the particles.
此外，还研究了飞行高度、飞行速度及水滴半径对水滴撞击特性的影响；
In addition, the effects of flight height, flight velocity, and radius of water droplet on droplet trajectories were also investigated.
黄村机场上空滑翔机飞行(特技飞行)，半径15公里，高度2000米以下。
Glider flights (Aerobatic flights) overhead Huang Cun field, radius 15km altitude 2000m below.
黄村机场上空滑翔机飞行(特技飞行)，半径15公里，高度2000米以下。
Glider flights (Aerobatic flights) overhead Huang Cun field, radius 15km altitude 2000m below.
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