ppos的读音 ppos中文意思

读音 
abbr. power page operating system 电源页操作系统
ppos 用法和例句
Medical insurance has turned into a system of prepaid services dictated by government rules , dominated by a convoluted system of hmos and ppos , and has its roots in the nixon administrat.ion of the early 1970s .
医保制度现已蜕变为一套由政府发号施令,受各种复杂的公营机构支配的预付费系统,其起源于1970年代的尼克松政府。