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本文报告甲苯和二甲苯柒毒四个月大鼠血液系统的改变。
This is a study of the changes in the haematopoietic system in4-month-old rats exposed to toluene and xylene .
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结果：接毒后1个月，法氏囊滤泡髓质淋巴细胞开始转化，接毒后2～5个月更明显，在法氏囊滤泡髓质区形成成淋巴细胞克隆增殖灶。
The results showed that the lymphocytes in the medulla of the follicles in bursa were transformed and clonal proliferated lymphoblastic foci were formed in the medulla at the 1st to 5th month of PI .