My English is very poor，but I tried my best to give you an excellent lecture, so I spent much time getting ready for it. Though the lecture lasted only one minute or two, it was a big challenge for me. To be honest, this was the first time I had spoken English in the face of so many people. So, if there are any mistakes, please forgive/understand me. I am a senior high school student in Grade Two. I'm aware of the importance of time. I will study harder later on. I think everyone thinks the same.