CCabbr.复写的副本(=carbon copy)abbr.立方厘米(=cubic centimetre(s))CCPabbr.合同更改建议（=contract change proposal）abbr.临界压缩压力（=critical compression pressure）abbr.中国共产党（=Chinese Communist Party）

1. Since China started to implement the policy of opening up to the outside, its total or semiclosure has been changed and the level of its economy and technology has been raised.
   实行改革开放以来，改变了过去封闭半封闭状态，提高了我国经济水平。