Smokeless fuel burns without producing smoke.
无烟燃料燃烧时不冒烟。
Most cities in Britain have introduced "Clean air zones", whereby factories and households are only allowed to burn smokeless fuel.
英国的很多城市都有“洁净空气区”,在这些地区工厂和家庭只能燃烧无烟燃料。
Most cities in Britain have introduced "Clean air zones", whereby factories and households are only allowed to burn smokeless fuel.
英国的很多城市都有“洁净空气区”,在这些地区工厂和家庭只能燃烧无烟燃料。
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