An EDG with flat input/output has many advantages. For example,in some applications an EDG without input and output waveguides is preferable and it is much easier to fabricate.是什么意思_An EDG with flat input/output has many advantages. For example,in some applications an EDG without input and output waveguides is preferable and it is much easier to fabricate.在线翻译_英语_读音_用法_例句