说明：  俄罗斯方块是一款世界流行的经典休闲小游戏，通过移动、旋转和摆放游戏中自动输出的各种方块，使之排列成完整的一行或多行并且消除来获得分数。使用键盘的“上下左右”键进行操作，有下一个方块的提示，显示当前关卡、已用时间、当前得分。
(Tetris is a world popular classic casual games, through a variety of block move, rotate and put the game automatically output so arranged in a complete elimination of one or more lines and to gain points. Using the keyboard' s " up and down" key is operated, there is a box next prompt, displays the current level, elapsed time, current score.)