名詞 casing:

1. the housing or outer covering of something
   同義詞：shell, case
2. the outermost covering of a pneumatic tire
3. the enclosing frame around a door or window opening
   同義詞：case

動詞 case:

1. look over, usually with the intention to rob
   同義詞：case
2. enclose in, or as if in, a case
   同義詞：encase, incase, case

1. Sam is casing the joint now. He's going to give us a report soon.
   薩姆現(xiàn)在正在偵察現(xiàn)場，他很快就會向我們報告情況的。
2. An oxygen mask will come down from overhead in case of an emergency.
   若發(fā)生緊急情況，頭頂上會降下一只氧氣面罩。
3. A decorative casing for a light, often of paper.
   燈籠燈的裝飾性外套，經(jīng)常用紙制成
4. Such a projectile in a metal casing; a cartridge.
   彈藥(筒)裝在金屬盒中的射彈。彈藥

cas.ing

n.（名詞）
An outer cover:
外殼：
例句：
a shell casing.
貝殼外殼

The frame or framework for a window or door.
門窗外框：一扇窗或門的框子或框架
A metal pipe or tube used as a lining for a water, oil, or gas well.
金屬套筒：用作水井、油井或氣井套筒的一根金屬管子
A membranous case, often made of animal intestine, used to contain sausage or other processed meat.
腸衣：通常由動物的腸制成的膜狀套子，用來裝香腸或者其它的肉類制品