Professor, very sorry, I got some things I want to go back and look, you will not be able noon meal together, I came to find two in the afternoon to talk to you about the situation on microwave photonics bar
Professor, I'm sorry, there's something wrong with my family. I have to go back for a while. I can't have lunch with you at noon. I'll come and talk to you about microwave photonics at 2:00 p.m.<br>