African-American patients with head and neck cancers die earlier than whites, and researchers say they have made a breakthrough in understanding the underlying reasons for the racial gap.
非洲裔美国人罹患头颈部癌患者死亡日期要早于白种人，并且研究者称他们对人种差别的根本原因上有了突破性的认识。
African-American patients with head and neck cancers die earlier than whites, and researchers say they have made a breakthrough in understanding the underlying reasons for the racial gap.
非洲裔美国人罹患头颈部癌患者死亡日期要早于白种人，并且研究者称他们对人种差别的根本原因上有了突破性的认识。
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