名词
中文翻译：封闭式类型
同义词：
['closed-loop', 'closed-loop system']
例句：
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1.The closed-end type of steel is stronger and more durable than open-end steel.
封闭式钢材比开放式钢材更坚固耐用。
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2.In the closed-end type of car, the engine is enclosed within the body.
在封闭式汽车中，发动机被车身所包围。
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3.The closed-end type of battery has a higher energy density and longer lifespan.
封闭式电池具有更高的能量密度和更长的使用寿命。