即使长时间暴露在极低的温度下，有些种子也能在三天内发芽。
Some seeds may germinate in three days even if they have been exposed to very low temperatures for a long time.
随着时间的推移，“先锋植物”的种子大量增加，这是农业集约化和地方环境日益受到干扰的证据。
As time went on, there was a substantial increase in seeds from pioneer plants, attesting both to agricultural intensification and to an increasingly disturbed local environment.
事实上，种子不能长时间保持发芽的能力。
Actually, the seeds don't retain the power to germinate for very long.
许多种子需要一段时间分层的原因是为了保证种子在恶劣的天气来临之后而不是之前生长。
The reason why many seeds require a period of stratification is to guarantee that the seeds grow after and not before unfavorable weather.
研究不同浓度PEG、不同处理时间渗透处理对超干杉木、马尾松和黑松种子活力的影响。
This paper dealt with the effects of PEG pretreatment, including different concentrations and treat time, on the vigor of ultradried seed, such as Cunninghamia lanceolata and Pinus massoniana.
利用丸粒化玉米种子干燥试验装置，研究了风温、风速、加热时间对丸粒化玉米种子干燥速率的影响。
The effects of temperature, velocity and time of heating on the rate of drying pelleted corn seeds were tested by means of the drying tester.
作者从指示植物的选用、玉米种子的前处理、培养器皿、加药方式、培养期间的光照处理、培养时间等诸方面对绿磺隆玉米主根长土培生测法进行了研究。
A methodology of maize radicle for bioassaying chlorsulfur on in soil was studied from indicating plant, pre-treating of seeds, cultivating containers, illuminating and time.
有效的浸种时间因结缕草种子质量不同而异。
结果表明，玉米种子的发芽势、发芽率、发芽指数和活力指数均随老化时间的延长而降低；
Activity of POD, which was positively correlated with virous vigor indexes of maize seeds, was also declined with aging time.
结果表明，玉米种子的发芽势、发芽率、发芽指数和活力指数均随老化时间的延长而降低；
Activity of POD, which was positively correlated with virous vigor indexes of maize seeds, was also declined with aging time.
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