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鸟类的眼隐藏在眼皮后面,像宝石一样晶莹璀璨。许多鸟的眼睛都能在瞬间将焦点由近放远或由远移近,这有利于它们在飞行中发现并捕捉食物。
The eye of the bird is hidden behind the eyelids, glittering like a gemstone. Many bird's eyes can move the focus away from near or far in an instant, which helps them find and catch food in flight.