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

票先来先买，售完为止。

《牛津词典》

You might want to add a pre-search—a search term that you define—the results of which will first come up when a user loads your page.

您可能想添加一个预搜索——您定义的一个搜索词——当用户加载您的页面时，将首先出现预搜索结果。

youdao

youdao

But Wednesday,the U.S.Senate joined the House in refusing the president's request for $80 million to close Guantanamo, saying he must first come up with a concrete plan to deal with the remaining 240 detainees.

VOA: standard.2009.05.21

Things can't become holy and can't come into contact with the holy or the sacred if they are not first pure.

事物不可能变得神圣或是与神圣有联系,如果它们连纯洁都算不上。

耶鲁公开课 - 旧约导论课程节选

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

"I have a track record of getting things when they first come out, " O'Day said.

WSJ: Darren O'Day: Here Comes the One-Wheel Reliever

"It's first come first served the way I look at it, " Charles Sweeney said.

CNN: Technology - 'Cybersquatters:' Invading big names' domains

It's first come, first served, and students are often turned away when the tiny studio fills up.

WSJ: In the Searching Pose