steaming hot; describes the appearance of heat or steam rising off food or drink

hot-air balloon; a balloon that rises because the air inside is heated and becomes lighter than the surrounding air

to liven up the atmosphere; to make a situation more lively and enthusiastic

The layer of the Earth's atmosphere above the mesosphere and below the exosphere, characterized by increasing temperature with altitude; also known as the [[增温层|增溫層|zeng1 wen1 ceng2]].