casing

名词 casing:

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

动词 case:

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

1. Sam is casing the joint now. He's going to give us a report soon.
   萨姆现在正在侦察现场，他很快就会向我们报告情况的。
2. An oxygen mask will come down from overhead in case of an emergency.
   若发生紧急情况，头顶上会降下一只氧气面罩。
3. A decorative casing for a light, often of paper.
   灯笼灯的装饰性外套，经常用纸制成
4. Such a projectile in a metal casing; a cartridge.
   弹药(筒)装在金属盒中的射弹。弹药

cas.ing

n.（名词）
An outer cover:
外壳：
例句：
a shell casing.
贝壳外壳

The frame or framework for a window or door.
门窗外框：一扇窗或门的框子或框架
A metal pipe or tube used as a lining for a water, oil, or gas well.
金属套筒：用作水井、油井或气井套筒的一根金属管子
A membranous case, often made of animal intestine, used to contain sausage or other processed meat.
肠衣：通常由动物的肠制成的膜状套子，用来装香肠或者其它的肉类制品