一天,胖胡汉买了一袋粮食,背到宿舍楼底,累得实在不行了.于是灵机一动,在瘦博士家窗口安装了一个滑轮,用绳子穿过滑轮,一头系住粮袋,另一头用力向下拉,一会儿,粮袋快要提升到胡汉的窗口了.碰巧这是瘦博士从街上走来,胡汉便请他帮帮忙.博士欣然同 One day, Fat Hu Han bought a bag of grain and carried it back to the dormitory floor. It was too much to be tired. So he took the initiative and installed a pulley in Dr. Thin’s home window. He crossed the pulley with a rope and tied a grain bag. Pulling it down hard, for a while, the grain bag is about to rise to the window of Hu Han. It happens that Dr. Skinny comes from the street and Hu Han asks him to help. The Doctor is pleased to share the same.