世界河马日，一个盛大的庆祝活动(World Hippo Day, a giant celebration)

是时候在世界河马日庆祝地球上最重的陆地动物之一了！这些非洲食草动物分布在撒哈拉沙漠以下的整个大陆，但由于栖息地的丧失，尽管它们的范围很广，但被列为易危物种。当河马在水中和周围生活时，它们不会游泳或漂浮。为了呼吸，它们在水下推离地面，这是一种即使在睡觉时也能做到的行为。河马在野外可以活到40岁，拥有世界上任何陆地动物中最大的嘴，所以对着镜头微笑是自然的。
原文：
It’s time to celebrate one of earth’s heaviest land animals on World Hippo Day! These African herbivores are scattered across the continent below the Sahara Desert, but despite their wide range are listed as a vulnerable species due to a loss of habitat. While they spend their lives in and around water, hippos can’t swim or float. To breathe, they push off the ground underwater, a behavior they can do even while asleep. Hippos can live up to 40 years in the wild and possess the largest mouth of any land animal in the world, so smiling for the camera comes naturally.
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