为何用"that is"?

问题描述:

为何用"that is"?

新华网24小时用四种语言发布新闻.这四种语言就是:汉语,英语,法语和西班牙语.eg:He is a local government administrator,that is (to say) a Civil Servant.他是个地方行政官员,也就是说是文官.like,such as 可以用...