随机取健康雄性大鼠分别与各组雌性大鼠合笼，比较生育仔鼠数量和存活率。
The male Wistar rats cohabited with the female ones to test the quantity and the survival rate of their offspring.
本文报道了作者于1976、1979年在巴里坤草原自然和罩笼条件下，观察优势种蝗虫取食范围、取食程度等研究结果。
The feeding habits of six dominant species of Catantopinae, Acridinae and Oedipodinae of Acrididae were studied in 1976 and 1979 in Barkol grassland, Xinjiang Uygur Autonomous Region.
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