名词
中文翻译：Unknown
同义词：
['guarding case', 'protection cover', 'protective shell']
例句：
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1. The new phone comes with a built-in protection casing to prevent accidental drops.
这款新手机内置了保护壳，以防意外摔落。
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2.The scientist developed a new material that could be used as a protection casing for spacecraft.
科学家研发了一种新材料，可用于太空船的保护壳。
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3. The car has a special protection casing that can absorb impacts from the road.
这辆车有一种特殊的保护壳，可以吸收来自路面的冲击。