名词
中文翻译：气体外壳
同义词：
['gas cap', 'gas bag', 'gas envelope', 'gas casing例句：1. The gas shell is designed to protect the engine from external pressure.（这个气体外壳的设计是为了保护发动机免受外部压力的影响。）2. The gas shell was used as a protective layer during the construction of the ship.（在建造船只的过程中，这个气体外壳被用作保护层。）3. The gas shell was removed before the engine could be tested.（在引擎可以测试之前，需要移除这个气体外壳。）']
例句：
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1. The gas shell is designed to protect the engine from external pressure.
这个气体外壳的设计是为了保护发动机免受外部压力的影响。
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2. The gas shell was used as a protective layer during the construction of the ship.
在建造船只的过程中，这个气体外壳被用作保护层。
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3. The gas shell was removed before the engine could be tested.
在引擎可以测试之前，需要移除这个气体外壳。