Radio activity 放射性
The middle radioactivity counts were 5 308,3 683 and 3 245 respectively.
放射性计数中位值:Ⅰ级图像5 308个,Ⅱ级图像3 683个,Ⅲ级图像3 245个。
参考来源 - 采集时间、注射药量与正电子发射体层摄影术图像质量RO, NF, UF, MF and ED in combination with conventional pretreatment technologies respectively are pointed out the main application processes nowadays by which can be obtained with radioactivity removal of 98%～99.9% and removal factor of 100～1000.
膜组合技术处理放射性废水净化率可达98%～99.9%、净化因子可达100～1000。
参考来源 - 膜分离技术处理放射性废水·2,447,543篇论文数据，部分数据来源于NoteExpress
With the invention of radio, television and most recently, the Internet and computer games, it seems that reading books is no longer a popular activity.
随着收音机、电视和最近的互联网和电脑游戏的发明，读书似乎不再是一种流行的活动。
BAE Systems will develop a new radar warning receiver prototype that can identify radio frequency and communications activity in real time.
BAE系统公司将开发一种新型雷达预警接收机原型，该原型能实时识别无线电频率和通信活动。
Additionally, it's also true that geomagnetic "storms" caused by solar activity can disrupt some radio communications, endanger satellites and even knock out power systems.
此外，由太阳活动引起的“地磁风暴”，确实可以破坏一些无线电通信，危害卫星，甚至瘫痪电力系统。
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