hesperornis

1.Hesperornis is an extinct genus of flightless aquatic birds that lived during the Late Cretaceous.

黄是一种已经灭绝的不会飞翔的水，活在白垩纪晚期。

2.Hesperornis was a speedy swimmer, taking short dives to feed on shoals of fish or other passing food.

它们是快速的游泳，进行短时间潜水来捕食鱼群和其他经过的猎物。