Interestingly, these T-R cavities employ old-fashioned spark gaps, complete with ozone smells and crackling sound tones.是什么意思_Interestingly, these T-R cavities employ old-fashioned spark gaps, complete with ozone smells and crackling sound tones.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句