1
a hippo
hippo 是可数名词，单数前常用 a/an。
A hippo can be very dangerous.
河马可能非常危险。
希波
先理解核心含义，再看它在真实句子里的用法。
希波
an ancient Numidian town in northwestern Africa, near present-day Annaba in northeastern Algeria
A hippo can be very dangerous.
河马可能非常危险。
此处指古努米底亚城市名，不是河马。
河马；[化] 吐根(的别名)
n. an ancient Numidian town in northwestern Africa adjoining present-day Annaba in northeastern Algeria
At the zoo, we saw a hippo opening its huge mouth by the water.
在动物园里，我们看到一只河马在水边张开大嘴。
Hippos may look slow, but they can run surprisingly fast on land.
河马看起来可能很慢，但它们在陆地上跑得惊人地快。
The mother hippo stayed close to her baby in the river.
母河马在河里紧紧贴着它的宝宝。
hippo 是可数名词，单数前常用 a/an。
A hippo can be very dangerous.
河马可能非常危险。
复数形式为 hippos。
Hippos are usually found near rivers and lakes.
河马通常出现在河流和湖泊附近。
用 the 表示特指某一只河马。
The hippo in the zoo looks huge.
动物园里的那头河马看起来很大。
Not this
I saw hippo at the zoo.
Use this
I saw a hippo at the zoo.
hippo 是可数名词单数，前面需要不定冠词 a；汉语没有冠词，所以学习者容易漏掉。
Not this
There are many hippo in the river.
Use this
There are many hippos in the river.
hippo 是可数名词，复数形式为 hippos；汉语名词没有复数变化，因此要记住加 -s。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
侏儒河马
The pygmy hippo is native to West Africa.
侏儒河马原产于西非。
普通河马
The common hippo can weigh over a tonne.
普通河马可以重达一吨以上。
小河马
A baby hippo was born at the zoo this morning.
今天早上动物园里出生了一只小河马。
一群河马
A pod of hippos rested in the shallow water.
一群河马在浅水中休息。
饥饿的河马！
The iconic title of the beloved Hasbro board game, first released in 1967, in which players race to collect marbles with their plastic hippos. It is often shouted with excitement and parodied in TV shows and movies.
这是广受喜爱的孩之宝经典桌面游戏的标志性名称，1967年首次问世，玩家用塑料河马比赛收集弹珠。这个名称常被兴奋地喊出，并在电视节目和电影中被模仿。
Use hippo naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
hippo由hip（臀部）和po（泼水声）组成：河马在河里撅臀泼水。记住hippo就是河马。
语域：informal 常见场景：everyday conversation、children's books、informal writing hippo 是 hippopotamus 的常用简称，通常用于日常口语、儿童读物等非正式场合；正式写作中比较常见的是完整形式 hippopotamus。
没有常用词与 hippo（/ˈhipəu/，即 /ˈhɪpəʊ/）完全押韵。photo、motto、rhino、polo 都以字母 -o 结尾且末尾读 /əʊ/，但重读元音不同，不算押韵；typo 拼写以 -po 结尾，但读 /ˈtaɪpəʊ/，重读元音是 /aɪ/，别按 hippo 读。
Dictionary facts from ECDICT, WIKTIONARY.