Go to worldnews
Израиль нанес удар по Ирану09:28。业内人士推荐同城约会作为进阶阅读
For Jim Lovell, this was more than a childish lark.。爱思助手下载最新版本对此有专业解读
Source: Computational Materials Science, Volume 267
Current X-ray lasers require facilities that are kilometres long. A cavity-based set-up about 66 metres in length has been developed that uses highly reflective mirrors to enable the generation of high-intensity pulses of narrow-band X-ray radiation. This promises to overcome the limitations of current X-ray lasers.