Scientists at the Cern lab in Geneva fired a beam of these particles through 450 miles of rock towards detectors in the Gran Sasso lab in Italy.
位于日内瓦的欧洲粒子物理研究所的科学家们向450公里外意大利格兰萨索地下实验室的探测器发射了一束中微子。
A web of security cameras, metal detectors, beam sensors and bullet-proof screens will reinforce security in the three-storey, 3, 000 square-metre building.
在这座三层楼高、3000多平米的建筑中，监视系统、金属探测器、光束传感器和防弹屏构成了一个网络，加强安全保卫。
Spiral Multi-detector CT uses 8, 16, 64 or more detectors during continuous motion of the patient through the radiation beam to obtain much finer detail images in a shorter exam time.
多排螺旋CT使用过程中病人的连续螺旋运动，通过辐射光束8，16，64或更多的探测器，在一个较短的考试时间获得更精细的细节图像。
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