The hotel features both twin and double bedrooms, which are booked on a first-come, first-served basis.
两个单人床的双人标间和一个双人床的双人卧室。
2
Tickets are available on a firstcome, firstserved basis.
票先来先买,售完为止。
《牛津词典》
3
Promptly the passage was full of squalid shirt-clad figures rushing for the bathroom, for there was only one tub full of water between us all in the morning, and it was firstcomefirstserved.