结果表明：添加不同剂量的中药桔梗提取物均可对鸡群产生保护作用。
The result showed that adding different dosages of radix platycodonis could protect the chicken of ILT.
为了阐明桔梗水提取物的安全性，本试验用昆明小白鼠对桔梗水提取物进行了较系统的毒理学试验。
In order to clarify the safety of straw water extract, Kunming mouse was selected to carry out the systematic toxicological experiment of straw water extract.
为了阐明桔梗水提取物的安全性，本试验用昆明小白鼠对桔梗水提取物进行了较系统的毒理学试验。
In order to clarify the safety of straw water extract, Kunming mouse was selected to carry out the systematic toxicological experiment of straw water extract.
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