The new system harvests this waste heat to drive the evaporation of seawater.

新系统收集这些废热来驱动海水蒸发。

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。