Half of the thermal load of a super-insulated home is due to heat losses through ventilation.
高隔热住宅的一半热负荷都归因于通风造成的热量损失。
The space of underground transportation system is always small and poor ventilation. Once a blast occurs in the tunnel, it will cause serious casualties and great economic losses.
地下交通系统空间小、通风条件差，一旦受到爆炸荷载的冲击，往往造成惨重的人员伤亡和重大经济损失。
It's even hard to recover those micro particles carried with ventilation. So, the losses of particles often happen in the production.
排风携带的粉尘颗粒更微细，回收这部分细粉比较困难，因此，生产过程中跑粉现象比较多见。
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