preset-time

例句：

1. 1.The meeting is scheduled for 3:00 PM, which is preset time.
   会议定于下午3点，这是预定时间。
2. 2. She set a preset time to meet us at the airport.
   她设定了一个预定时间在机场接我们。
3. 3.The clock was set to the preset time before the alarm went off.
   闹钟响之前，时钟被设定到了预定时间。