产品详情
说明： 一个小球垂直向上运动。一个小球沿45向上运动，线程运用
(a small ball vertical upward movement. A small ball along the 45 upward movement, using threads)
(a small ball vertical upward movement. A small ball along the 45 upward movement, using threads)
文件列表：
xiaoqiu.TXT
