The villagers were forced to use oil lamps, which are not only expensive but also dangerous because of the harmful gases they produce.
村民们被迫使用油灯,油灯不仅昂贵,而且它们所产生的有害气体十分危险。
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Davida Herzl, Aclima's boss, says they have revealed pollution highs on days when San Francisco's transit workers went on strike and the city's inhabitants were forced to use their cars.