In the cooling room, picnic rugs were laid out on the central marble slab.

冷却室里，野餐地毯铺在中央大理石板上。

The air conditioning doesn’t seem to be cooling the room much.

【cool】这空调系统好像没怎么把房间变凉快。

This has two sobering implications for air-conditioning engineers: first, all machines generate inefficient waste heat; and second, deliberately cooling a room requires power.

这对空调工程师来说有两个值得警惕的含义：首先，所有机器都会产生低效的废热；其次， 有意给房间降温需要耗电。