英语语法分析

Low average population densities are characteristics of most underdeveloped countries.

平均人口密度低是大多数不发达国家的特点。

As densities increased, domestic architecture became larger, culminating in crowded pueblos.

随着密度的增加，住宅建筑变得更大，最终形成拥挤的村庄。

The cultivation of crops has expanded into progressively drier regions as population densities have grown.

随着人口密度的增长，农作物的种植已经扩展到了越来越干旱的地区。