front edge短语⁷⁶⁹⁴⁷ 基本例句 n.前沿 The generation of ultrashort pulses is not only one of the key technologies to realize OTDM/ WDM but also the front edge research about nonlinear optics and ultrafast optics. 超短光脉冲的产生不仅是实现 OTDM/ WDM的关键技术之一，同时也是非线性光学、超快光学等研究方向的前沿课题。 cnki