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the Firth of [place]
苏格兰常见的地名结构，专有名词中 Firth 首字母需大写。
We took a cruise up the Firth of Clyde.
我们乘船游览了克莱德湾。
峡湾；河口
firths — plural of firth
先理解核心含义，再看它在真实句子里的用法。
峡湾；河口
a long, narrow estuary, especially in Scotland
We took a cruise up the Firth of Clyde.
我们乘船游览了克莱德湾。
海湾；河口。
An arm or inlet of the sea; a river estuary.
The fishing village sits near a wide firth where the river meets the sea.
这座渔村坐落在一片宽阔的河口湾附近，那里河流汇入大海。
We walked along the path that follows the firth all the way to the old lighthouse.
我们沿着那条顺着峡湾一直延伸到旧灯塔的小路散步。
Several firths along the coast provide calm water for small boats.
海岸边有几处河口湾，为小船提供了平静的水域。
苏格兰常见的地名结构，专有名词中 Firth 首字母需大写。
We took a cruise up the Firth of Clyde.
我们乘船游览了克莱德湾。
firth 为可数名词，泛指时用 a；复数形式为 firths。
They anchored in a firth to wait for the tide.
他们在一处河口抛锚等待潮汐。
该短语表示跨越河口或海湾，常用来描述两岸的相对位置。
The old lighthouse stands on the opposite shore across the firth.
那座老灯塔就矗立在海湾的对岸。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
福斯湾
Edinburgh lies on the southern shore of the Firth of Forth.
爱丁堡位于福斯湾的南岸。
马里湾
The Moray Firth is famous for its dolphins.
马里湾以海豚闻名。
河口湾口
The village is built at the mouth of the firth.
这个村庄建在河口湾口。
横渡河口湾
The ferry crosses the firth every hour.
渡轮每小时横渡河口湾一次。
《第五河口》——英国乐队Genesis 1973年歌曲名，借用苏格兰地名“Firth of Forth”（福斯湾）的文字游戏。
Fishing boats still cross the Firth of Forth every morning, just as they have for centuries.
每天早晨，渔船仍然穿行于福斯湾，就像几个世纪以来一样。
Use firths naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想苏格兰地名 Firth of Forth（福斯湾）：firth 即河口峡湾，且与 forth 形近，看到地名就想起词义。
语域：formal 常见场景：地理、水文等专业语境、苏格兰地名 多用于正式或地理、水文等专业语境，也常见于苏格兰地名中；日常对话中较少使用。
这些词与 firth /fɜːθ/ 押韵：birth, berth, earth, girth, mirth, worth（重读音节都是 /ɜːθ/）。注意拼写相似的 hearth 读作 /hɑːθ/，与 firth 不押韵。
Dictionary facts from ECDICT, WIKTIONARY.