Most rainforests too degraded to provide good habitats 多数雨林退化严重而无法为 ...
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.
美国之音23 天
中国加强非洲战略：王毅宣布10亿军事援助，深化中非合作与西方竞争
中国外交部长王毅最近结束对纳米比亚、刚果、乍得、尼日利亚四国的访问，宣布将提供10亿元人民币的无偿军援，培训7000名非洲军警人员，并邀请 ...