无人机 Unmanned Aerial Vehicle (UAV)

　　The universal platform of the China-developed Wing Loong-1 Unmanned Aerial Vehicle (UAV) has been tested fit for facilitating space-air-ground emergency communication.

　　The Wing Loong-1 UAV universal platform was loaded with wireless communication base station equipment, and hovered at an altitude of 3 to 5 km across a radius of 3 km during the tests. It provided prolonged and stable coverage over 50 square km with continuous mobile signals, a record high domestically for air-to-ground coverage from an airborne base station.

　　中国自主开发的翼龙I无人机通用平台已完成测试，将服务于空地协同应急通信保障需要。

　　翼龙I无人机通用平台搭载无线通讯基站设备，测试期间，在海拔3千至5千多米高度、以半径3千多米持续盘旋，成功实现超过50平方公里范围内、长时稳定的连续移动信号覆盖，创下了国内空中基站对地覆盖最大面积的新纪录。

　　自由电子激光装置 free electron laser

　　Scientists from the Dalian Institute of Chemical Physics, under the Chinese Academy of Sciences (CAS), and Tsinghua University, using China-developed vacuum ultraviolet free electron lasers, have observed a 3D structure in a water cluster, which is composed of five water molecules.

　　In chemistry, a water cluster is formed by molecules of water. When water molecules reach a certain number, the water cluster will present 3D structures. A water cluster with a 3D structure can be called a water droplet. Previous studies show that the smallest water droplet is composed of six molecules. This discovery, therefore, has changed the understanding of water structure.

　　中国科学院大连化学物理研究所和清华大学的科学家利用中国自主研制的真空紫外自由电子激光装置，在由五个水分子组成的水团簇中发现了三维立体结构的存在。

　　从化学角度来说，水团簇由水分子形成。当水分子达到一定数量时，水团簇将呈现三维立体结构。具有三维立体结构的水团簇称为水滴。以往研究认为，最小的水滴由六个水分子组成，而此次研究发现突破了对水结构的认知。

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