VERB
预热；预先加热
If you preheat an oven, you switch it on and allow it to reach a certain temperature before you put food inside it.
例句
Preheat the oven to 400 degrees...
将烤箱预先加热到400度。
Bake in the preheated oven for 25 minutes or until golden brown.
在预热过的烤箱里烤25分钟，或烤成金黄色。