错过了学前教导这一要害期则往往事倍功半。
Has missed preschool education this critical period often the wasted effort.
采用GJ89型粮虫陷阱检测器对钢板仓害虫物种分布组成及主要害虫书虱和螨类在不同储藏期各部位的分布进行了调查研究。
GJ89 type probe traps were used to monitor stored grain insects species, distribution in different storage periods in the steel silo.
采用GJ89型粮虫陷阱检测器对钢板仓害虫物种分布组成及主要害虫书虱和螨类在不同储藏期各部位的分布进行了调查研究。
GJ89 type probe traps were used to monitor stored grain insects species, distribution in different storage periods in the steel silo.
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