名词
中文翻译：封闭共振腔
同义词：
['closed cavity', 'closed resonator例句：1. The engineer designed a closed resonator to improve the efficiency of the machine.（工程师设计了一个封闭共振腔来提高机器的效率。）2. The closed resonator is used in various applications such as telecommunications and electronics.（封闭共振腔被用于各种应用，如电信和电子。）3. The closed resonator plays an important role in the design of high-frequency circuits.（封闭共振腔在高频电路的设计中起着重要的作用。）']
例句：
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1. The engineer designed a closed resonator to improve the efficiency of the machine.
工程师设计了一个封闭共振腔来提高机器的效率。
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2. The closed resonator is used in various applications such as telecommunications and electronics.
封闭共振腔被用于各种应用，如电信和电子。
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3. The closed resonator plays an important role in the design of high-frequency circuits.
封闭共振腔在高频电路的设计中起着重要的作用。