英语新词，新义．

１）digital certificate: 数字证书
Ex: A digital certificate , often referred to as a SSL( Secure Socket Layer) Server Certificate ,is becoming more and more popular in some countries now.

2) NIH ( Not Invested Here) syndrome
Ex: Providers of expertise tend to feel that knowledge sharing is an avoidable overhead,while consumers suffer from the NIH( Not Invested Here) syndrome.