The background limit values and maximum allowable background densities of population in small towns of the area were calculated.

并对该地区小城镇人口的背景极限值和最大允许背景密度进行了推算。

youdao

The results are as follows: The distribution pattern of larvae is aggregative ( negative binomial distribution) . The aggregation dose not change with the densities of population of leaf miner.

结果表明：烟草潜叶蛾幼虫在田间呈聚集分布，聚集强度不因种群密度的改变而改变。

youdao

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。

youdao

This is because the country is spoilt with a long coastline and an abundance of mountains, valleys, rivers and rolling farmlands, plus one of the lowest population densities in Europe.

BBC: The wild taste of Wales

In large parts of America, where population densities are lower, it would be much costlier.

ECONOMIST: Online grocers

While countries such as Bangladesh started micro-credit programmes in the 1970s, low population densities in many areas of rural Latin America have meant that micro-credit schemes have been seen as economically unviable in the region.

BBC: Low interest loans for Latin Americans