1. The thermostat is already preset to a comfortable temperature.
这个恒温器已经预设到一个舒适的温度了。

2. The computer program allows you to preset your preferences before using it.
这个计算机程序可以让你在使用之前预先设置个人喜好。

3. The meeting agenda was carefully preset to ensure smooth discussions.
会议议程事先安排得很仔细，以确保讨论顺利进行。