USAGE NOTE 用法说明: first name
Your first name is your own name that people who know you use when they are speaking to you — this is also sometimes called your Christian name, especially in British English. Your last name is the one you share with all the members of your family — this is also called your surname in British English. Some people also have a middle name that comes between their other two names. This name is usually used only on official documents. first name 指认识的人称呼你时所用的名字 — 这有时也被称作 Christian name（教名），尤其是在英国英语中。last name 指姓 — 在英国英语中也叫 surname。有些人在名和姓之间还有 middle name（中间名），一般仅用于正式文件中。