Aphids are small sap-sucking insects whose parthenogenetic reproduction and short generation time allow them to increase population size rapidly.
蚜虫是一类刺吸式口器的小型昆虫，孤雌生殖、世代周期极短、繁殖率高，这使得蚜虫种群增长迅速。
They produced alkali in yeast extract mannitol (YEM) medium and the generation time was more than six hours.
该类菌在酵母浸出物-甘露醇(YEM)培养基上产碱、代时6小时以上。
Many research have revealed that there are differences in generation time, morphology and function between T1A and T2A.
研究表明，T1A和T2A在发生时间、细胞形态及功能等方面均存在差异。
Life cycle, generation time, fecundity, and egg production quantity are the main factors to determine these two species' vertical migration.
生命周期、世代时间、繁殖力和产卵量是决定这两种桡足类垂直移动的主要因素。
With this method, data collected from the field test were calculated, and the threshold was gained which can be used to determine the generation time of driving fatigue.
运用该方法对现场试验采集的数据进行计算，得到了能够确定驾驶疲劳开始产生时刻的驾驶疲劳度的阈值。
Meanwhile, its main development time was accordant with the main gas generation time in Ordos Basin, and promoted formation of different types of favorable traps in Western Ordos Basin.
同时，它形成和主要发育时期与鄂尔多斯盆地天然气的主生烃期一致，也促成了盆地西部不同类型有利圈闭的形成。
Meanwhile, its main development time was accordant with the main gas generation time in Ordos Basin, and promoted formation of different types of favorable traps in Western Ordos Basin.
同时，它形成和主要发育时期与鄂尔多斯盆地天然气的主生烃期一致，也促成了盆地西部不同类型有利圈闭的形成。
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