而被称之为“背老二”的这些人，用成千上万的血肉之躯，化成了文明河流时期的汽车和火车，让长沙、常德、里耶千里牵手，促进了巴蜀与湘楚的物资交流和经济繁荣。
O O O O O O B-Person I-Person I-Person O O B-Person I-Person I-Person O O O O O O O B-Thing I-Thing I-Thing I-Thing O O O O O O O O O O O B-Thing I-Thing O B-Thing I-Thing O O B-Location I-Location O B-Location I-Location O B-Location I-Location O O O O O O O O B-Location I-Location O B-Location I-Location O O O O O O O O O O O