Hesperornis is an extinct genus of flightless aquatic birds that lived during the Late Cretaceous.
黄昏鸟是一种已经灭绝的
会飞翔的水鸟，生活在白垩纪晚期。
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能飞的Hesperornis is an extinct genus of flightless aquatic birds that lived during the Late Cretaceous.
黄昏鸟是一种已经灭绝的会飞翔的水鸟，生活在白垩纪晚期。
The penguin is a flightless bird.
企鹅是一种会飞的鸟。
In some species, such as aphids, the flightless morph lacks wings and is called the apterous morph.
一些
种类，如蚜，
无翅个体，被称为无翅型。
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