run-length的用法和样例：
词汇搭配
- two-dimension run length encoding 二维行程编码...
- run-length limited encoding 游程长度受限编码...
- run length encoding 行程编码
- run length coding 运行长度编码...
- run length 扫描宽度
- advanced run-length limited encoding [计] 高级游戏长度...
- run length limited code 游程长度受限码...
- length of run 滑走距离,展开长度,...
