Then he sent Jenniskens figures detailing the address—latitude, longitude and altitude—of the asteroid every six miles en route to Earth, plus its speed and angle of approach.
That means that the best way to launch a high-altitude projectile is to send it flying at a 90-degree Angle to the ground-straight up.
这表明使抛物体能够抛到高处的最好方法就是使它以跟地面成90度的角度抛出，也就是竖直往上抛出。
3
Instead, they had their eyes glued to the cockpit instrument panel, which showed key information such as airspeed, altitude, Angle of flight, and fuel and oxygen supply.