translation.en: Even worse, with our intention of trying to make buildings move towards a net-zero energy state, we can't do it just by making mechanical systems more and more efficient.
translation.zh: 更差的是 当我们想要让这些建筑 变成一个没有能量流入或者流出的状态 我们 无法通过提高系统运转效率而达到目的