The last century 80's, the United States, France, Japan and other countries begin to gradually develop clean coal combustion technology for power generation.
上世纪80年代，美、法、日等国开始逐步研发煤清洁燃烧发电技术。
The last century 80's, the United States, France, Japan and other countries begin to gradually develop clean coal combustion technology for power generation.
上世纪80年代，美、法、日等国开始逐步研发煤清洁燃烧发电技术。
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