1PHRASAL VERB (尤指将已经冷掉的熟食)加热 When you heat something up, especially food which has already been cooked and allowed to go cold, you make it hot. (尤指将已经冷掉的熟食)加热 [Also VERB n PREPOSITION]
Freda heated up a pie for me. [VERBPREP. noun]
弗蕾达为我热了一块馅饼。
2PHRASAL VERB 激化;加剧;变得激烈(或热烈) When a situation heats up, things start to happen much more quickly and with increased interest and excitement among the people involved. 激化;加剧;变得激烈(或热烈)
Then in the last couple of years, the movement for democracy began to heat up. [VERBPREP.]
然后在过去几年里,民主运动开始升温。
3PHRASAL VERB 变热 When something heats up, it gradually becomes hotter. 变热
In the summer her mobile home heats up like an oven. [VERBPREP.]
夏天一到,她的活动住房就变得像烤炉一样热。
SYN warm up, get hotter, become hot, rise in temperature