煤渣，煤屑：燃烧过或部分燃烧过的物质，如煤，未形成灰烬但不能继续燃烧。
Cinder: burned or partly burned substance, such as coal, that is not reduced to ashes but is incapable of further combustion.
煤渣，煤屑：燃烧过或部分燃烧过的物质，如煤，未形成灰烬但不能继续燃烧。
Cinder: burned or partly burned substance, such as coal, that is not reduced to ashes but is incapable of further combustion.
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