在房屋密集区必须放慢速度。

You must drop your speed in built-up areas.

矗立于东大阪的一处人口密集区的中心。

Standing in the center of a densely populated area in East Osaka.

从那两场灾难就可以看出该地区主要人口密集区与当前环境的强烈不适。

The tragedy surrounding those two storms underline just how maladapted major population centers in the region are to today's conditions.

连云山上石含锂铍钽铌矿床位于连云山背斜南翼上石伟晶岩密集区，其地层为板溪群二云母片岩。

Li- Be-Ta-Nb-bearing deposits in Lianyun Mountain occurred in Shangshi on the south wing of Lianyun Mountain anticline, the densely distributed pegmatite area.