n.用戶標(biāo)識符
You know that each person has a user name called a userid. 人們都知道，使用計算機的每個人都有一個用戶名，叫做用戶標(biāo)識符。
It is this userid that we use as the first part of someone's address. 正是這個用戶標(biāo)識符，我們把它作為某個人網(wǎng)址的第一部分。
