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beaver fur
beaver fur 指海狸毛皮时是不可数名词。
This coat is made of beaver fur.
这件大衣是海狸毛皮做的。
海狸毛皮
先理解核心含义，再看它在真实句子里的用法。
海狸毛皮
the soft brown fur of the beaver
This coat is made of beaver fur.
这件大衣是海狸毛皮做的。
河狸属半水生啮齿动物,尾巴宽扁,脚有蹼,原产于北半球
A semiaquatic rodent of the genus Castor, having a wide, flat tail and webbed feet, native to the Northern Hemisphere.
黄油
Butter.
美国俄勒冈州的本地人或居民
A native or resident of the American state of Oregon.
河狸的柔软棕色毛皮
the soft brown fur of the beaver
The old hat was made of soft beaver, and it felt warm in winter.
那顶旧帽子是用柔软的海狸毛皮做的，冬天戴着很暖和。
She bought a collar of dark beaver at the market.
她在市场上买了一条深色海狸毛皮领子。
In the past, trappers sold beaver to make coats and gloves.
过去，捕兽者出售海狸毛皮来制作外套和手套。
beaver fur 指海狸毛皮时是不可数名词。
This coat is made of beaver fur.
这件大衣是海狸毛皮做的。
beaver 可直接修饰表示衣物的名词，说明材质。
He bought a beaver coat from the shop.
他从商店买了一件海狸毛皮大衣。
这种表述较书面；日常更常用 beaver fur。
The fur of the beaver is thick and soft.
海狸的毛皮又厚又软。
Not this
She bought a beaver's coat for the winter.
Use this
She bought a beaver coat for the winter.
英语中表示材料的名词直接放在被修饰词前作定语，不加's；'beaver's coat' 指海狸本身的皮毛，而非一件用海狸毛皮做的衣服。
Not this
I bought a beaver to make a hat.
Use this
I bought beaver to make a hat.
表示‘海狸毛皮’这一材料时，beaver 是不可数名词，不能用不定冠词 a；a beaver 指一只海狸动物。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
海狸毛皮
The hat is made of beaver fur.
这顶帽子是海狸毛皮做的。
海狸毛皮大衣
She bought a long beaver coat for winter.
她买了一件过冬的长款海狸毛皮大衣。
海狸毛皮帽
In the nineteenth century, a beaver hat was a sign of status.
在十九世纪，海狸毛皮帽是身份的象征。
海狸毛皮领子
The old coat has a beaver collar.
那件旧外套有海狸毛皮领子。
积极勤奋的人
The new intern is an eager beaver, always the first to arrive and the last to leave.
新来的实习生是个积极勤奋的人，总是第一个到，最后一个走。
非常忙碌
She's been busy as a beaver preparing for the conference.
她为了准备会议一直忙得不可开交。
沃德，难道你不觉得你对比弗有点太严厉了吗？
In the classic sitcom Leave It to Beaver, this line is said by June to her husband Ward in defense of their young son, whose nickname is Beaver.
在经典情景喜剧《留给比弗》中，这是琼对丈夫沃德说的话，为他们的儿子（昵称‘比弗’）辩护。
发长 /iː/ 音 (如 sea, tea)
Same pattern, same sound
Use beaver naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
海狸（beaver）啃树筑坝，毛皮柔软做帽子——看到 beaver 就想到“海狸”和它的毛皮。
语域：neutral 常见场景：fashion and textiles、historical fur trade、material descriptions 此义项指海狸毛皮，属于中性常用表达，多出现在服装面料、皮草贸易或物品材质描述中。
cleaver、weaver、believer、receiver、fever 都与 beaver 押韵（美音 /ˈbiːvɚ/）。注意 lever 是形近异读词，美音读 /ˈlɛvɚ/，不押韵。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.
Watch the sound change