Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient world slept only 6.5 hours a night.

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...

扫描目录，分析文件结构和统计信息，给任意文件添加备注，导出带注释的树形文本和其它多种数据格式，大大方便书写技术 ...