For example, the China State Construction Engineering Corporation employed almost 300 local subcontract teams in Algeria, the localization procurement rate of housing projects being 85%, with an annual procurement value of US$400 million.
问:上句中the localization procurement rate of housing projects being 85%,为插入语么,它是什么语法结构,为什么用了being ?在句子中充当什么句子成份?还有with an annual procurement value of US$400 million.是介词短语作什么状语?