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1·The effect of different concentration Brassica rapa root juice on the reproduction quantity of different strain fruit files was studied in different temperature and space.

以野生型果蝇、白眼果蝇为实验动物，研究不同浓度芜菁块根汁（以下简称块根汁）在不同温度、不同空间下对其发生量的影响。