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
Nothing will stay down when I eat.
我吃下去的东西全吐出来了。
Appearances are deceitful.
人不可貌相，海水不可斗量。
It's only three hundred pounds. But, of course, it's not as good as the expensive one.
它只要300英镑。但是，它当然没有价钱高那种好。