Brian Gu left school at 16 and started repairing air-conditioning systems.

Brian Gu在16岁时离开学校，开始维修空调系统。

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Mechanical engineers aren't particularly interested in making lighter units. Instead, they're focusing on developing more ecological air-conditioning systems.

机械工程师们没有特别的兴趣去制作更轻的空调器，与之相对的，他们正在致力于开发更环保节能的空调系统。

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So Maidment and colleagues are investigating the idea of using the heat generated by CO2-based air-conditioning systems and fridges in supermarkets, for example, to provide hot water for nearby homes.

所以梅特门特和同事们正在调查利用超市二氧化碳制冷的空调和冰箱所产生的热能的想法，例如，给附近家庭提供热水。

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Utilities would be better off storing power in flywheels, or as ice for air-conditioning systems, he says.

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The latter would enable long-haul truckers to plug in to power their air conditioning systems, TVs, etc.

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It can end up in artificial water supply systems, including air conditioning systems, water services and cooling towers.

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