英语词汇“middle vacuum”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	middle vacuum
释义	middle vacuum 基本例句空中 Sound can not be conveyed in a vacuum.真空中声音无法传播。 Sealed inside a glass tube, a stream of electrons carried a current through a vacuum between electrodes.在一个密封的玻璃管内，带电的电子流在两电极间的真空中流动。
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