中国生产的煤大多为劣质动力煤，杂质含量高，适合发电。以前大多数城市里的空气都有一股硫磺味儿

来源: shopman 于 2025-09-12 07:16:37 [旧帖] [给我悄悄话] 本文已被阅读：次

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