heating-up

例句：

1. 1. The car is heating up as we get closer to the destination.
   随着我们接近目的地，汽车开始加热。
2. 2.The engine needs to be warmed up before it can start.
   发动机需要预热才能启动。
3. 3.The room is heating up due to the high temperature outside.
   由于外面的高温，房间正在加热。