Soil fungi can both fix and mineralize soil nutrients and also play an active part in soil aggregate formation, which should be very important in paddy soil system.

真菌能够固结、矿化土壤养分，促进土壤团聚体的形成，它在水稻土中有很重要的作用。

youdao

Firstly, the wall effect of the aggregate distribution density of concrete and the formation mechanism of boundary layers were investigated by applying a simple simulation algorithm.

首先，应用一种简单的模拟算法，分析了混凝土骨料分布密度的边界效应和边界层形成机理。

youdao

Mixing, spreading, compacting of RCC, formation of structural joints, treatment of construction joints, prevention of aggregate segregation and its handling are given.

碾压砼拌和、平仓、碾压、结构缝的形成、施工缝处理、骨料分离的防止与处理措施。

youdao