casing
/ˈkeɪsɪŋ/📚 12633 32中考高考四级六级考研雅思A casing is a substance or object that covers something and protects it. 保护套
noun [具体名词]套；盒；（香肠的）肠衣；包装
The vacuum flask has a strong casing, which won't crack or chip. 这个真空瓶有一个坚固的外壳，不会破裂。
verb [vt. 及物动词]围绕，包盖；（盗抢前）探察，踩点儿；装入保护容器内（case 的现在分词）
When most people think of the word "education", they think of a pupil as a sort of animate sausage casing. 当大多数人想到“教育”这个词的时候，他们把学生看作是一种活生生的香肠肠衣。
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