·2,447,543篇论文数据，部分数据来源于NoteExpress
Illegal dumping and poor disposal of toxic waste — including a large ships' graveyard in Mauritania — are among the chief suspects.
废料的非法和不合理倾倒- - -包括毛利塔尼亚的船只坟墓- - -将是调查的主要因素。
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