河馬是一種又大又重的動物，它們有著圓圓的身體，短短的腿和寬寬的嘴巴。河馬喜歡在水中生活，因為它們的皮膚容易干燥。它們可以在水下呆很長時間，因為它們可以屏住呼吸。河馬是非常強壯的動物，它們可以輕易地摧毀樹木和草叢。雖然它們看起來非常溫和，但它們的攻擊力是非常強的，所以人們不應該靠近它們。

英語翻譯：

Hippos are large and heavy animals with round bodies, short legs, and wide mouths. They prefer to live in the water because their skin is prone to drying out. They can stay underwater for a long time because they can hold their breath. Hippos are very strong animals and can easily destroy trees and grass. Although they look very gentle, their attacks are very strong, so people should not get too close to them.