The different kinds of think accretion disk models, the accretion disk model for ultravioletexcess and the self-gravitating accretion disk model in QSOs axe briefly reviewed.
本文对类星体的各种厚吸积盘模型，紫外超现象的吸积盘模型及自引力吸积盘模型作了简扼评述。
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At times, water pollutants or excessultraviolet radiation may act alone to cause specific problems, such as disfigured bodies and eye or skin abnormalities.