The effects of the grain size and grain gradation of styrofoam particles as well as the expendable polystyrene(EPS)forming tools on the surface roughness of EPS patterns were studied in the paper.

研究了泡沫聚苯乙烯粒径、泡沫颗粒的粒度级配、成型发泡模具对EPS模表面粗糙度的影响。

youdao

The larger the roughness of leaf surface, the larger density of the particles was.

叶表面粗糙程度越大，颗粒物附着密度越高。

youdao

It was movement of particles of soil, but it has high roughness that reduces the transport capacity of sediment of the runoff.

UNESCO: AQUATACAMA