Most lightning flashes occur near the strong convectiveregion, and a few flashes occur in the stratiform region of the squall line.
绝大多数闪电发生在对流区，有少数闪电出现在层云区域。
2
The residual effects of the cloud clusters are generally ignored even though the area they cover is perhaps an order of magnitude larger than the convectiveregion itself.
云团的残余影响通常是忽略不计的，即使它们覆盖的地区比对流区本身可能大一个量级也如此。
3
For the cold protosolar accretion disc, convective instability will gradually end from the outer region to the center and from the surface to central plane.