古时候,曾经有人披上羽毛,希望能够像鸟儿一样扇动翅膀就能飞起来;还有人身上绑着风筝,坐着捆绑炸药的椅子,希望借助爆炸的升力把自己送上天空。但人类第一次实现飞行的梦想是在1903年,美国的莱特兄弟制成了世界上第一架有动力的飞机,翱翔蓝天。最早的飞机是木结构,后来改成全金属;飞机的发动机也由活塞式发展成喷气式。飞机飞得越来越高,飞得越来越远,甚至飞上了太空。 In ancient times, some people once wore feathers, hoping to fly like a bird with wings on their wings. Others were tied with kites and chairs tied with explosives, hoping to lift themselves into the sky with the power of the explosion. But the first human dream of flying was that in 1903, the Wright brothers in the United States made the world’s first powered plane and soared into the sky. The earliest aircraft was a wooden structure, and later changed to all-metal; aircraft engine also developed from piston to jet. Planes fly higher and higher, fly farther and farther, and even fly into space.