For undergraduate courses have a "heat", "university physics", "generalastronomy", guide the students papers 30;
为本科生主讲课程有《热学》、《大学物理学》、《普通天文学》，指导本科生论文30篇；
2
The general theories behind echelle and its applications in astronomy are briefed, and the differences between echelle spectrograph and plane grating spectrograph are analyzed and compared.
What is the main question which still remains unanswered and which you would like to hear an answer to in astronomy in general or in your field of research in particular?