blow up,body of letter是什么意思

网络释义

1)blow up,body of letter,字身2)digital identity,数字身份3)body,活字字身4)depth,字身大小5)height of shank,字身高度6)Digital Identity Authentication,数字身份认证

Since 2002,China has begun digital identity certification in E-commerce.

数字身份认证(CA认证)是防范电子商务风险的重要方法。