first-come-first-served

基本解释

Reservations are on first-come-first-served basis.
座位数量有限，订位先到先得。
blog.sina.com.cn
During this period holders of valid trade marks will be able to register domains before they become available on a first-come-first-served basis a few months later.
在这个期间合法的商标囤户能登记领域在他们变得可利用根据一个一来一被服务的依据几个月后之前。
Should a free course be cancelled due to bad weather, registrants must enrol in another free course. There is no transfer of booking. Enrolments will be accepted on a first-come-first-served basis.
如学员所报读的免费课程因恶劣天气而取消，学员必须重新登记其他免费课程，不能转换留位，新登记的课程的收生程序以先到先得方法处理。

Note that supplies are limited, and systems will be sold on a first-come, first-served basis.
ENGADGET: Wii U gets midnight launch at Nintendo World Store on November 18th
Tickets will be distributed -- one ticket per person -- on a first-come, first-served basis.
WHITEHOUSE: You're Invited: Join the White House Fall Garden Tour
However, the White House will distribute tickets for fall garden tours to the public on a first-come, first-served basis.
WHITEHOUSE: You're Invited: Join the White House Fall Garden Tour