GbEng
我已经在这个旅馆里预订了一个房间。 I have engaged a room at this hotel.
可以来信或传真预订。 Reservations can be made by letter or fax.
我们预订了下一班的机票. We're booked on the next flight.
我们为你在普拉扎旅馆预订了两夜的房间. We've booked you in at the Plaza for two nights.
在我完全不了解的情况下, 她已先行办好了度假的预订手续. Quite unknown to me, she'd gone ahead and booked the holiday.
我将为你预订直飞伦敦的航班。 I'll book you on a direct flight to London.
在预订时交付定金是一般的[普遍遵守的]惯例. It is accepted/standard practice to pay a deposit with one's order.