heat up (heating,heated,heats)

• 1.  

  PHRASAL VERB（动词词组） When you heat something up, especially food which has already been cooked and allowed to go cold, you make it hot. 把…加热

  例：

  Freda heated up a pie for me but I couldn't eat it.

  弗雷达为我热了一块馅饼，可我不能吃。

• 2.  

  PHRASAL VERB（动词词组） When a situation heats up, things start to happen much more quickly and with increased interest and excitement among the people involved. 升温

  例：

  Then in the last couple of years, the movement for democracy began to heat up.

  于是在过去几年里，民主运动开始升温。

• 3.  

  PHRASAL VERB（动词词组） When something heats up, it gradually becomes hotter. 变热

  例：

  In the summer her mobile home heats up like an oven.

  在夏天，她的活动住房像个烤箱那样热起来。