cna是什么意思，cna怎么读

abbr.chrome-nickel alloy 铬-镍合金；collagen adhesin gene 胶原外源凝集素基因，胶原植物凝集素基因

" Official rates of crime and social unrest have risen much faster than the size of the public security forces over the past three decades , " says murray scot tanner , of cna , a research company in virginia .

“过去30年里，中国官方发布的犯罪率和社会骚乱的增长远快于公安队伍规模的增长，”位于弗吉尼亚州的研究机构美国海军分析中心（cna）的谭睦瑞（murrayscottanner）表示。