warm sth up to heat food that has already been cooked 重新加热(食品) You can just warm up the leftovers from yesterday's meal in the microwave. 你或许只需用微波炉热一热昨天剩的饭菜就可以了。 OK, I was going to cook dinner first, but I don't think I have enough time now. I'll just warm up some leftovers in the microwave. 好的，我正准备先做晚饭呢，但是我觉得时间不够啦，那我就在微波炉里热一点剩饭吧。