1
in the mailroom
指在邮件收发室这个地点；常见搭配有 work, sort, deliver 等。
She is sorting packages in the mailroom.
她正在邮件收发室里整理包裹。
邮件收发室
mailrooms — plural of mailroom
先理解核心含义，再看它在真实句子里的用法。
邮件收发室
a room in a business or other building where mail is sorted, processed, and distributed
She is sorting packages in the mailroom.
她正在邮件收发室里整理包裹。
收发室；邮件收发室
A room used for receiving and (usually) sending mail.
Please leave the package in the mailroom by the front door.
请把包裹放在前门旁边的邮件收发室。
She works in the mailroom and sorts letters every morning.
她在邮件收发室工作，每天早晨分拣信件。
All the mailrooms in this office building close at six.
这栋办公楼里的所有邮件收发室六点关门。
指在邮件收发室这个地点；常见搭配有 work, sort, deliver 等。
She is sorting packages in the mailroom.
她正在邮件收发室里整理包裹。
mailroom 作定语修饰名词时用单数形式，如 mailroom clerk。
The mailroom clerk delivered the letters.
邮件收发室职员送了这些信件。
Not this
There are many mails in the mailroom.
Use this
There is a lot of mail in the mailroom.
mail 在英语中是不可数名词，表示“邮件”时没有复数形式，不能用 many 修饰，也不能加 s。要表达“许多邮件”，应用 much 或 a lot of 修饰不可数名词 mail。
Not this
He works in mailroom.
Use this
He works in a mailroom.
mailroom 是可数名词，单数形式前需要冠词 a/an 或 the。汉语中没有冠词，学习者容易漏掉，所以应说 in a mailroom（或 in the mailroom，取决于语境）。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
在邮件收发室工作
She worked in the mailroom for two years before her promotion.
她在邮件收发室工作了两年，之后得到了升职。
邮件收发室职员
The mailroom clerk sorts letters and packages every morning.
邮件收发室职员每天上午分拣信件和包裹。
邮件收发室工作人员
The mailroom staff distributed the notices to all departments.
邮件收发室工作人员把通知分发给所有部门。
邮件收发室主管
He asked the mailroom supervisor to track the missing parcel.
他请邮件收发室主管查找丢失的包裹。
在邮件收发室里
There was a pile of packages in the mailroom.
邮件收发室里有一堆包裹。
从收发室到董事会（比喻从底层一路晋升到高层）
He went from the mailroom to the boardroom in less than a decade.
不到十年，他就从收发室一路做到了董事会。
Use mailrooms naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想“邮件（mail）所在的房间（room）”，堆满信件的房间就是邮件收发室。
语域：neutral 常见场景：office buildings、corporate offices、university campuses mailroom 是中性常用词，通常指公司、机构或校园中负责收发信件的房间，多见于商务或后勤语境。
mail matches the stressed first syllable /meɪl/. room, broom and bloom share the final /uːm/ sound of mailroom but are not true rhymes, because mailroom's main stress is on /meɪl/. flood and blood are spelling lookalikes with the same -oo- but are pronounced with /ʌ/, not /uː/.
Dictionary facts from ECDICT, WIKTIONARY.