"The East African countries that have seen remarkable improvements, such as Kenya and Ethiopia, host mega infrastructures partly funded and wholly developed by the Chinese. This has not only significantly bridged Africa's infrastructure deficit, but has strategically positioned these countries' economies to benefit from China's ambitious Belt and Road Initiative," says Kagiri.
Al Serrian, located in the southwestern Arabian Peninsula, was prosperous from the ninth to the 13th century.
激光技术在美军中占有不可取代的地位。早期 ，美军主要利用激光的 “制导”和 “测距”两大功能 ，为导弹和炸弹制导 ，激光本身并不能作为进攻手段 ，仅仅充当其他火力平台的 “战力倍增器”。随着科技进步 ，激光武器的个头越做越小 ，功率却越来越大：今年8月下旬 ，美国海军在 “庞塞”号登陆舰上安装了一门功率为30 千瓦的激光炮 ，并将该舰派往波斯湾执行秘密任务；以 “密集阵”为基础的激光武器已经过多次试验 ，初步具备了拦截掠海来袭导弹、迫击炮弹和火箭弹的实战能力；以 “悍马”车为底盘的 “复仇者”激光武器系统可灵活机动 ，专打敌方战机和小型无人机。可见 ，美军的激光武器已经发展成为 “能打能防”的成熟武器 ，开始从试验场走向战场。
"For instance, greater access to mobile technology in China has fostered the expansion of the 'sharing economy', which is expected to reach 10 percent of GDP by 2020," the report says.
Once again, however, the findings were met with skepticism. The stalagmite used for dating was a short distance from the fossils, and some argued that the area could have been disturbed by geological processes.