Nov 17, 2010 Since I became a postgruaduate student, I have feelt that time is limited. In my undergraduate time, I had a lot of spare time. I didn't know what to do, especially in my freshman and sophomore years. I haven't considering my future until the 8th semester. I thought that taking part in the entrance exam for postgraduate schools might be a mistake. However, I am in postgraduate shool now. So I have to enrich every day now.