离层区是木本双子叶植物及裸子植物落叶前，叶柄或叶基部所形成离区的部分细胞层。
突水机制表明，可以通过向积水离层区施工放水钻孔的方法来防治此类突水事故。
The mechanism of separation area water inrush indicates that probing and discharging borehole drilled to the separation area can prevent this kind of water inrush.
通过对巷道顶板离层时间及规律进行分析，采用马丽散对顶板离层超范围区进行加固，取得明显效果。
Through Analysis on roadway roof separation time and law, Adoption malison reinforcing roadway roof separation Exceed the range area, Make the obvious result.
极区电离层强烈地受到极区对流电场、极光粒子沉降和场向电流等的影响。
The polar ionosphere is strongly influenced by convection electric fields, auroral particle precipitation, and field-aligned electric currents etc.
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