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
翔的水鸟，生活在白垩纪晚期。
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翔的水鸟，生活在白垩纪晚期。
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