A tour of duty
值班, 值日勤务
🧩 词语组成解析
tour
[tuə]
n. 旅行，观光;巡回演出;任职期;轮班;
vt. 到…旅游;在…巡回演出;
vi. 观光;巡回;
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
🗣️ 情景例句
They don't have room service at Old Country Inn. Old Country Inn
没有房间服务部。
I asked him to fix it for me, but he wouldn't.
我请他帮我修理，但是他不肯。
This applies particularly to chemical industries,
这在化学工业方面尤其突出。