名词
中文翻译：封闭容器
同义词：
['closed container', 'sealed vessel']
例句：
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1.The closed vessel was sealed tightly to prevent leakage.
这个封闭容器被密封得严严实实以防止泄漏。
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2. The engineer carefully inspected the closed vessel before opening it.
工程师仔细检查了那个封闭的容器，然后才打开它。
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3. The closed vessel contained a mixture of chemicals that needed to be analyzed.
这个封闭的容器里装着一种化学物质混合物，需要进行分析。