在英语中,当河马感到饥饿时,可以说 "The hippopotamus is hungry." 或 "The hippo is hungry."

"Hippopotamus" 这个词来自希腊语,意思是 "water horse"。它由 "hippos"(水)和 "potamus"(马)两个词构成。

下面是一些英文例句及其中文翻译:

"The hippo ate a whole watermelon for breakfast." (河马早餐吃了一整个西瓜。)
"The hippopotamus is always hungry because it eats so much." (河马总是饿,因为它吃得太多了。)
"The zookeeper has to feed the hungry hippos twice a day." (动物园看护员每天要给饥饿的河马喂食两次。)