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

票先来先买，售完为止。

《牛津词典》

youdao

For farmers, it's first come, first served - if you "pin" a sugar beet field, nobody else is supposed to grow seed for Swiss chard within three miles.

对农民来说，就是先到先得，如果你现在地里种上了甜菜，没人会在你周围三英里范围内再种瑞士甜菜。

youdao

"Nobody owns what's on the seabed but if you've got gear on the area it's first come, first served and that's the nature of the beast, " he added.

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The stunning white Lipizzaner stallions perform twice a week, and less expensive morning training sessions are open to the public on a first come, first served basis, starting at 9 am.

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Restaurant reservations must be made at least a few weeks in advance, while seats at the wine bar can be had on a first-come, first served basis.

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