没有空调也能清凉一夏

4. Go downstairs.
下楼

Warm air is less dense than cooler air so it ends up layered on top of the downward moving cooler air. Make your way to the basement or lower level. It will be cooler there.
热空气比冷空气密度小，因此热空气总在冷空气上方。去地下室或者较低的地方吧，那里会更凉快。