中等的

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

长英质的变种照例具有中晶的粒度。

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

对家蚕有中程度的感染能力，经卵传染频率较低.

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

一次中程度的降雨条件下,钙在壤垂直方向上生淋溶迁移转化。

Apply by coal of ecumenic serous thickness.

中难度成浆的煤种。

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

在空战训练的过程中他的双座F-15和一架A-4生了中程度的空中碰撞。