So far, I had a lot of courses, so I got a lot of flight information, such as: the helicopter flight principle, why can birdie wings to fly, there will be resistance flight, lift, gravity and thrust.

• 至今，我上了许多的课程，也因此我获得许多有关飞行的知识，例如：直升机飞行的原理，小鸟为什麽可以用翅膀飞，飞机飞行时会有阻力、升力、重力和推力。