论文部分内容阅读
朗日清空,凉风阵阵,你独自骑着自行车,正在享受着轻松写意单车之旅。怎料一个急转弯之后,出现了一道很陡的斜坡,这时,你会……
Long day clear, breezy, you are riding a bicycle alone, enjoying the ease of cycling. After a sharp turn, there was a very steep slope where you would ...