... RIL (Research Information Letter) 研究信息通讯 RI level无线电干扰电平 rim 边，缘，齿圈，垫环，轮缘，轮，磁轭 ...
双语例句
1
Surveys were developed and distributed to a randomly selected sample of 10,000 clubs to identify relevance and efficacy of current RI programs at the club level.