Two different types of external signals, viz. the CW and modulated unipolar non-return-to-zero (NRZ) signals are applied to the electro-optic modulator.是什么意思_Two different types of external signals, viz. the CW and modulated unipolar non-return-to-zero (NRZ) signals are applied to the electro-optic modulator.在线翻译_英语_读音_用法_例句