translation.en: Over time, the buildings got taller and bigger, our engineering even better, so that the mechanical systems were massive. They require a huge amount of energy.
translation.zh: 随着时间的推移 房屋越建越高 我们的工程学应用更好了 所以这些机械系统 被大规模运用 而它们需要大量的能源去运转