In conventional vapour-compression systems used by aircon units, the refrigerant is compressed and condensed and then expanded and evaporated to cool the room.
空调设备使用的传统的蒸发压缩循环系统中，冷却剂被压缩冷凝后膨胀气化来给房间制冷。
Travel in the developing world often involves appallingly long, uncomfortable bus journeys with speed-freak drivers, doubtful safety standards and aircon that is permanently set to 'Max'.
旅行在第三世界国家经常需要乘坐不舒服的、不安全的长途公车。公车的安全标准令人怀疑，空调被长期设定成最大。
Travel in the developing world often involves appallingly long, uncomfortable bus journeys with speed-freak drivers, doubtful safety standards and aircon that is permanently set to 'Max'.
旅行在第三世界国家经常需要乘坐不舒服的、不安全的长途公车。公车的安全标准令人怀疑，空调被长期设定成最大。
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