ADJ of ignoble or common parentage; not royal or noble 出身卑微的
The researchers bred rotifers in three different environments: one in which the quality of available food was high, one in which it was low and one in which it was mixed.
研究者们设置了三种不同的环境来饲养轮虫：一种是可获取食物质量相当高的环境，一种是质量低的环境，还有一种趋于两者的混合。
By means of intervarietal crossing and linear selection, the new rape variety "Youyan No. 1" of low erucic acid and "Youyan No. 2" of "Double Low"(low erucic acid and low glusosiolate) have been bred.
通过品种间杂交和系谱法选择，育成了甘兰型低芥酸油菜新品种“油研1号”和甘兰型“双低”油菜新品种“油研2号”。
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