1. 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。
2. 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。
3. Many of them have dropped their Blackberry over and over with little more than some scratches on the casing. 他们中的许多人一次又一次地把他们的黑莓手机掉在地上，而手机外壳上只有几处划痕。
4. Engineer Glen Dash says his team used a new measuring approach that involved finding any surviving remnants of the casing in order to determine where the original edge was. 工程师格伦·达什说，他的团队使用了一种新的测量方法，包括寻找任何幸存下来的外壳残余物，以确认金字塔最初的边界位置。
5. The casing is nearly airtight, which helps protect the vulnerable egg and later larva. 外层几乎是密封的，可以保护脆弱的蜂卵，以及后来的幼虫。
