The four VCT units are activated by the positive and negative torques generated by opening and closing the intake and exhaust valves, instead of by oil pressure.是什么意思_The four VCT units are activated by the positive and negative torques generated by opening and closing the intake and exhaust valves, instead of by oil pressure.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句