Aplitic varieties are the rule, with the grain size ranging from medium to pegmatitic.

长英质变种照例具有中等至伟晶粒。

The microsporidian had a medium oral infectivity and low transovarian transmission to sillworm, Bombyx mori.

蚕有中等程感染能力，经卵传染频率较低.

In a middling rainfall condition, calcium eluviate and movement in uprightness direction.

一次中等程降雨条件下,钙在壤垂直方向上发生淋溶迁移转化。

Apply by coal of ecumenic serous thickness.

中等难成浆煤种。

During air combat training his two seater F-15 was involved in a mid air collision with an A-4 Skyhawk.

在空战训练过程中他F-15和一架A-4天鹰发生了中等程空中碰撞。