Is there any thing wrong with the statement "多嚴重的汙染,隻要不繼續排汙,過三十年恐怕也自然淨化了"?
回複:"多嚴重的汙染,隻要不繼續排汙,過三十年恐怕也自 然淨化了" ?
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Heavy metal in soil will stay there for long time without expens
-kybluegrass-
♂
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03/16/2013 postreply
13:33:45