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ppb
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【化】 十亿分率
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详细解释：
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以下为句子列表：
英文: In original English language for the 1st impression.The Net Price to the Publisher is at the ratio 1.6 of the PPB cost.
中文: 原书第一次印刷的文字形式是英文。出版者支付的净价依据PPB成本1.6的比率计算。
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英文: Carassius auratis L. were fed persistently with a ration containing aflatoxin B at concentration ranging ppb to 0 ppb. After weeks,all the test fish were killed. and of fish were noted to have primary hepatocellular carcinoma.
中文: 本文报道用含－ 0ppb黄曲霉毒素B（AFB）饲料连续喂养鲫鱼（CarassiusauratusL）诱发鱼肝癌，周后处死，实验组尾鲫鱼中有尾出现原发性肝细胞癌，肝癌诱发率为 ．％。
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