- 1
A coypu is a large water rodent, originally from southern South America. It looks a little like a beaver — brown fur, strong swimming, a life in rivers and marshes — but the tail is round, like a rat’s, not flat. The teeth are a deep orange, which students often remember once they have seen a picture. People kept coypu on farms for the fur; in the fur trade the same animal is often called nutria, and that is the name you will hear most in American English. Many animals escaped or were let go, so wild coypu now live in rivers far from South America, and in some places they are treated as a pest because they tear up banks and plants. The word is a straight animal name, a bit specialist: you meet it in nature writing, farming, and invasive-species news, not in everyday chat.
海狸鼠（毛皮貿易裡也常叫 nutria）
組成English took this from Spanish coipú, which came from Mapudungun koypu, the name in a language of southern South America. It does not split into English pieces.
原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
coypunoun/ˈkɔɪ.pu/
- 1
A large, crepuscular, semiaquatic rodent (Myocastor coypus) resembling a large rat, having bright orange-yellow incisors, native to South America and introduced to Europe, Asia and North America, valued for its fur in eastern Europe and central Asia and considered a pest elsewhere.
- We are walking south-west, down a gently increasing slope, with the old farm buildings of the tiny hamlet of Villemiers [in the department of Charente] visible on the other side of the valley a kilometre away. The Transon [a tributary of the river Charente] meanders in the bottom of the valley below, a lazy trickle of a stream with small muddy pools at intervals, home to numerous coypu, a South American rodent that escaped from fur-farms long ago and has found a home-from-home in the many rivers and lakes of the Charente. They are semi-aquatic, resembling beavers in all but their long, rat-like tails. They can be something of a nuisance, as they are great burrowers, creating huge holes in the banks just on the waterline, which does little harm in a stream, but can be disastrous in a man-made lake, since their burrows can puncture the dam.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。