作为英语老师，我可以从以下五个方面来介绍' on duty '这个单词或者缩写词：

1. 意思

‘On duty’ 意为 在值班或执勤，表示已经开始或正在执行工作职责。

2. 用法

‘On duty’ 是一个短语，可以在句子中作为谓语或副词使用。

3. 同义词

‘On duty’ 的一些同义词可以是‘At work’、‘Working’、‘On the job’等等。

4. 适用情况

‘On duty’ 适用于描述职业工作，例如、医生、或其他需要执勤或值班的职业。

5. 相关短语

与‘on duty’ 相关的一些常用短语有‘Off duty’，表示不在值班或工作时间内；‘Call of duty’，表示职责召唤。

下面是5个中英例句：

1. The security guard is on duty at the entrance of the building.

(保安正在大楼入口值班)

2. The doctor was on duty all night and slept only a few hours.

(医生整晚在值班，只睡了几个小时)

3. The police officers were on duty during the parade to ensure everyone's safety.

(在期间值班，确保每个人的安全)

4. The pilot needs to be alert and focused while on duty in the pit.

(飞行员在驾驶舱内值班时需要保持警觉和专注)

5. The customer service representative is on duty from 9am to 5pm every weekday.

(客服代表工作日从上午9点至下午5点值班)

on duty的意思是“在职”的意思。

中文翻译：在职

读音：[n djuti]

例句：

1. The security guard is on duty 24 hours a day.

保安每天24小时在职。

2. The doctor is on duty at the hospital tonight.

医生今晚在医院值班。

3. The police officer was always alert while on duty.

值班时总是保持警觉。

on duty在中文中有"化、值班"的意思，在日常中也代表"值日"的意思，发音音标为[onduty]，on duty是一个英语名词，在《郎文当代高级英语辞典》中，共找到84个与on duty相关的例句。

On duty的释义

1.化

例句:Love is the death of duty. (情爱是责任的死敌. Love is the death of duty.)

2.值班

例句:No, of course not. it抯 my duty. (No, of course not. it抯 my duty.)

3.值日

例句:As your counsel, it is my duty to strongly advise you against this. (it is my duty to strongly advise you against this.)

4.在工作时间内、值日

例句:Simmons left you with truncheon duty? (翻译:西蒙斯让你负责检测吗? Simmons left you with truncheon duty?)

用法及短语

on duty一般作为名词使用，如在duty(①关税②职责 )、the duty([网络] 职责)、differential duty(差别关税)等常见短语中出现较多。

例句

1. As your counsel, it is my duty to strongly advise you against this. (翻译:it is my duty to strongly advise you against this.)

2. Simmons left you with truncheon duty? (翻译:西蒙斯让你负责检测吗? Simmons left you with truncheon duty?)

3. No, it was a dereliction of my duty. (翻译:No, it was a dereliction of my duty.)

4. I need you two back on shield duty. (翻译:要请你俩回去继续修复防护罩 I need you two back on shield duty.)

5. A country that he is duty-bound to serve. (翻译:他有对这个国家服务的义务 A country that he is duty -bound to serve.)

6. Honestly, I feel just so blessed to have this duty. (翻译:坦率讲 我非常幸运得到这项职责 Honestly, I feel just so blessed to have this duty.)

7. On blue dust duty today we have, uh... (翻译:今天的蓝色仙尘任务是由... 呃... On blue dust duty today we have, uh...)

8. Everyone was simply doing their duty. (翻译:每个人不过是尽了自己的职责 Everyone was simply doing their duty.)

9. She says Robert has to do his duty. (翻译:She says Robert has to do his duty.)

10. ♪ When duty calls my name ♪ (翻译:™ When duty calls my name ™)

11. This is a duty I must heed. (翻译:这是我要履行的责任 This is a duty I must heed.)

12. For friends, it is my duty to pay tribute... (翻译:to the government. For friends, it is my duty to pay tribute...)

13. Coulson still has me off combat duty. (翻译:科尔森还是不让我参加实战任务 Coulson still has me off combat duty.)

14. But as my sainted father always said, "Duty, Adelaide, always duty." (翻译:但是正像我那圣明的父亲所说 责任 阿德莱德 一定要负责任)

15. He said you were on research duty. (翻译:He said you were on research duty. 他说你只负责找资料)