Hi，我是 PJ，我想把這邊當作是一個個人專屬的討論區，使用方式是： 我會先問自己一個問題，開啟一個話題，若你有興趣回覆或討論，歡迎在話題下方留言。 當然也歡迎 ask me anything ！ --- Hi, I'm PJ, I would like to use this site as a personal forum. I'll ask myself a question and start a thread, and if you're interested in replying or discussing, feel free to leave a comment below. Of course, feel free to ask me anything!