先着(せんちゃく)first arrival

申込(もうしこみ)を先着(せんちゃく)の順(じゅん)に受(う)け付(つ)ける。

We accept applications on a first-come, first-served basis.

デパートへ来(き)た先着(せんちゃく)20名(めい)にプレゼントを渡(わた)す。

We will give gifts to the first 20 people who come to the department store.

滞在(たいざい)先(さき)のホテルに荷物(にもつ)が先着(せんちゃく)した。客(きゃく)はその後(あと)に来(き)た。

The luggage arrived first at the hotel where we were staying. The guests came after that.

コンサートチケットは先着(せんちゃく)販売(はんばい)で、もうとっくに完売(かんばい)しました。

The concert tickets were sold on a first-come-first-served basis and have been sold out for quite a while now.

診療(しんりょう)は先着(せんちゃく)の順(じゅん)だ。従(したが)って、待(ま)ち時間(じかん)を少(すく)なくしたいなら早(はや)く受付(うけつけ)を済(す)ませるべきだ。

The consultation is on a first-come, first-served basis. Therefore, if you want to reduce your waiting time, you should check in as early as possible.