The form preset is used in the present tense and is the past tense and past participle. preset的过去式和过去分词与原形相同。
										- VERB 预先设置,预调(设备)
 If a piece of equipment is preset, its controls have been set in advance of the time you want it to work.- ...a computerised timer that can be preset to a variety of programs...
 可以预设各种程序的电脑定时器
- Bake the cake in a preset oven.
 在预先设置好的烤箱中烤蛋糕