Birds are special animals that can fly.
鸟类是能够飞翔的特殊动物。
They use their wings to lift themselves into the air.
它们用翅膀产生升力，使自己飞向空中。
When birds flap their wings, they push air downward.
当鸟类扇动翅膀时，它们会把空气向下推。
This creates lift, which helps them stay in the sky.
这会产生升力，帮助它们在空中飞行。
The shape of a bird’s wings is important for flying.
鸟类翅膀的形状对飞行非常重要。
Some birds have long, narrow wings for fast flying.
一些鸟的翅膀又长又窄，适合快速飞行。
Others have broad wings that help them soar.
有些鸟的翅膀宽大，有助于它们滑翔。
Birds also have lightweight bodies and strong muscles.
鸟类的身体很轻，肌肉却很强壮。
This helps them flap their wings quickly.
这使得它们能快速扇动翅膀。
Not all birds fly in the same way.
并不是所有鸟的飞行方式都相同。
Some birds, like eagles, soar high in the sky.
一些鸟，比如老鹰，会在空中高高翱翔。
They spread their wings and glide without flapping much.
它们张开翅膀，几乎不用扇动就能滑翔。
Hummingbirds flap their wings very fast, almost like buzzing.
蜂鸟的翅膀扇动得非常快，像嗡嗡作响一样。
Penguins and ostriches are birds, but they cannot fly.
企鹅和鸵鸟是鸟类，但它们不会飞。
Instead, penguins use their wings to swim in the water.
企鹅用翅膀在水里游泳。
Ostriches have strong legs that help them run fast.
鸵鸟有强壮的腿，能跑得很快。
Birds fly to find food, escape danger, and migrate to warm places.
鸟类飞行是为了寻找食物、躲避危险或迁徙到温暖的地方。
Now you know that birds fly using their wings, and different birds have different flying styles!
现在你知道鸟类靠翅膀飞翔，不同的鸟有不同的飞行方式了！
