1
a postbag full of sth
postbag 是可数名词，可用 a postbag full of ... 说明袋中装的东西。
The postman carried a postbag full of letters.
邮递员背着一只装满信件的邮袋。
邮袋
先理解核心含义，再看它在真实句子里的用法。
邮袋
a bag that a mail carrier carries over the shoulder for delivering letters and parcels.
The postman carried a postbag full of letters.
邮递员背着一只装满信件的邮袋。
邮袋
n letter carrier's shoulder bag
The mail carrier slung the heavy postbag over her shoulder before starting her route.
邮递员把沉甸甸的邮袋挎上肩膀，然后开始派送路线。
Every morning he empties the postbag and sorts the letters into different piles.
每天早晨他倒空邮袋，把信件分成不同的堆。
These old postbags from the 1960s are now displayed in the museum.
这些20世纪60年代的旧邮袋现在在博物馆里展出。
postbag 是可数名词，可用 a postbag full of ... 说明袋中装的东西。
The postman carried a postbag full of letters.
邮递员背着一只装满信件的邮袋。
in the postbag 表示“在邮袋里”，常与 there be 句型连用。
There were several packages in the postbag.
邮袋里有几件包裹。
postbag 的复数形式是 postbags；作主语时谓语动词用复数。
The postbags are heavy because they are full.
这些邮袋很重，因为它们是满的。
Not this
The postman carried two postbag.
Use this
The postman carried two postbags.
postbag 是可数名词，复数形式为 postbags；表示两个或两个以上邮袋时必须加 -s。
Not this
I put the letter in the postbag on the street corner.
Use this
I put the letter in the postbox on the street corner.
postbag 指邮递员背的邮袋，不是投信口；街道拐角处供投信的是 postbox（邮箱/邮筒）。两者形状和用途不同，不能混用。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
邮递员的邮袋
The postman's postbag was slung across his chest.
邮递员的邮袋斜挎在胸前。
背邮袋
She watched the postman carry a postbag down the street.
她看着邮递员背着邮袋沿街走去。
鼓鼓囊囊的邮袋
He returned from his round with a bulging postbag.
他送完信回来，带着一只鼓鼓囊囊的邮袋。
沉重的邮袋
The heavy postbag dragged on his shoulder.
沉重的邮袋压得他肩膀往下沉。
他把货车里所有的邮袋都装好。（出自英国儿童动画《邮差帕特》主题曲）
Every morning, the postman slings his postbag over his shoulder and starts his round.
每天早晨，邮递员把邮袋往肩上一甩，就开始投递了。
Use postbag naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
post（邮寄）+ bag（袋子）→ 邮递员肩上背的邮袋，记住“邮寄的袋子”就是邮袋。
语域：neutral 常见场景：邮政局、邮递员工作、邮件分拣 该词指邮递员使用的邮袋，属于中性具体名词，多用于描述邮政或邮件运送场景，通常没有明显的正式或非正式色彩。
与 postbag 押韵且拼写都以 -bag 结尾的词有 bag、handbag、sandbag、mailbag、carpetbag、ragbag。注意 postage、postal 等词虽以 post- 开头，但读音分别为 /ˈpəʊstɪdʒ/、/ˈpəʊstəl/，与 postbag 不押韵。
Dictionary facts from ECDICT, WIKTIONARY.