Feed the mice with different doses of liquor of paraquat and observe the toxic symptom.
给小鼠灌服不同浓度的百草枯溶液，观察小鼠的中毒症状；
To study the effects of the super thin pearl powder with different doses on sleep improvement.
研究不同剂量超细珍珠粉对改善睡眠的影响。
The clinical symptoms and gross lesions were similar in birds infected with different doses of oocysts.
结果显示，不同剂量感染引起的临床症状和各病死鹅的肉眼病变基本相似。
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