我们可不是简简单单的一群大雁,我们是世界上最出色的空中旅行家。鸟类比昆虫和蝙蝠更善于飞行。我们善于飞行的秘密在于我们胸腔和翅膀的形状。我们的胸部肌肉非常发达,可以轻易地扇动宽大的翅膀。这是我们能够起飞和自由翱翔于天空的动力来源。你相信吗?我们大雁是世界上飞行速度最快的鸟类之一。只有正在追逐猎物的游隼,才会比我们飞得更快。 We are not a simple group of geese, we are the world’s best air travelers. Birds are better at flying than insects and bats. The secret we are good at flying is the shape of our chest and wings. Our chest muscles are well developed and can easily flap large wings. This is where we can take off and fly freely in the sky. Do you believe it? We are one of the fastest flying birds in the world. Only peregrines that are chasing prey will fly faster than us.