Tickets are available on a first come, first served basis.

票先来先买，售完为止。

《牛津词典》

The distccd seems to work on a first come, first working basis.

distccd的工作原则好像是先到先工作。

youdao

Space will be limited and registration will be accepted on a first come basis.

席位有限，将遵循先到先注册的原则。

youdao

A lot of people come to the National Zoo, and the first animal they want to see is the giant pandas,".

VOA: standard.2010.02.02

It's the outcome of a race one's running faster than all of the other guys and it's as if to have a career at all one has no choice but to come in first.

这里讲的是一项竞赛的结果,某个人比其他所有人跑的都快,就好像这场竞赛中,除了第一你别无选择。

耶鲁公开课 - 弥尔顿课程节选

That's a crucial mistake that we make when we first try to come to terms with what Freud means by "the death wish."

如果我们一开始就试图理解弗洛伊德所谓的,“死亡冲动“就犯了大错误了“

耶鲁公开课 - 文学理论导论课程节选

No appointments are available for the Saturday open house and service will be provided on a first come, first served basis.

FORBES: IRS Announces "Fresh Start" Assistance on July 16

They sell them on a first come, first serve basis to the first 20 people in line when the box office opens.

BBC: Broadway on a budget

Spectators can make applications at any point during the six-week period as it will not be a first come, first served process, the committee said.

BBC: London 2012 Olympic tickets on sale 15 March