风筝的飞行隐藏着什么科学原理？英文的！！！！

Kite (device), wind-supported flying device consisting of a wooden or similar framework covered with paper, cloth, or synthetic material. A kite is a rudimentary airfoil; it can be flown for pleasure or for purposes of study. Attached to a long string, it can be sent aloft through the action of the wind on its surfaces. Its distance or height is controlled from the ground by playing out the string. Kites are of ancient origin and were flown by various Asian peoples and the ancient Egyptians. Today kite flying is a popular pastime and a competitive sport. In eastern Asia, special competitions are held in which the kites are elaborately designed and decorated in the forms of birds, fish, or dragons and may be equipped with whistles or pipes that emit musical sounds as the wind blows through them. Kite-fighting contests are also held, in which competitors attempt to use their kites to attack and down the kites of opponents.

Kites have been employed for practical purposes