book up

• • 订(票)，预订(火车票、飞机票、船票)；定(座)，预订(火车、飞机座位或旅馆房间等)：

    You'd better book up if you want to go.

    如果你想去的话，最好先把票订好。

  • [常用被动语态]被预订一空，客满，满座：

    The plane is booked up to its full capacity.

    该航班的机票已被预订一空。

  • [常用被动语态](因日程排满而)没空，没空闲时间，忙着与…约定：

    Sorry,I can't come. I'm already booked up for that morning.

    对不起，我来不了，我那天上午已有约会。

    I'm afraid I can't come. I'm booked up all next week.

    恐怕我来不了，下个星期我完全没有空。