Describes the physical characteristics, lifestyles, and environmental effects of such insects as ants, beetles, flies, and spiders.
本书介绍了蚂蚁、甲虫、苍蝇之类的昆虫和蜘蛛的形体结构特征、生存方式及其对环境的影响。
This paper describes the constituent, the structure and the physical characteristics of fly ash which might have favourable influence on "Pozzolanic reaction".
本文阐述了粉煤灰的组分、结构及物理性质，因为它们对粉煤灰的“火山灰反应”产生有益的作用。
This paper describes the constituent, the structure and the physical characteristics of fly ash which might have favourable influence on "Pozzolanic reaction".
本文阐述了粉煤灰的组分、结构及物理性质，因为它们对粉煤灰的“火山灰反应”产生有益的作用。
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