基本解释[动力与电气工程]信号极性转换开关英汉例句双语例句A convenient and an essential PHASE switch is included to allow for proper subwoofer signal polarity to be selected.一个既方便又一个重要阶段,包括开关,以便适当的低音信号极性被选中。signal polarity switch更多例句专业释义动力与电气工程信号极性转换开关