beaver

河狸、海狸

A family of beavers built a dam across the shallow stream.

一家子河狸在浅溪上筑了一道水坝。

河狸毛皮、海狸皮

The old coat was lined with soft beaver.

那件旧大衣内衬是柔软的河狸毛皮。

埋头苦干、努力工作口语，常用 beaver away

She beavered away at the report until well past midnight.

她埋头赶那份报告，一直忙到半夜过后。

工作狂、做事勤快的人口语，eager beaver

The new intern is a real eager beaver.

新来的实习生真是个做事超积极的人。