This agreement goes back some 70 years, and has almost entirely benefited the military at the expense of the main population.

这个协议可以追溯到70年前，其目的差不多完全是为了军事设备，而损失了主体人口作为代价。

youdao

After filamentous bacterium bulking the number of microbiota decreased, and rotifers, epistylis and arcella became the main population.

系统内发生丝状菌污泥膨胀后，微型动物种类减少，主要优势种群为轮虫、累枝钟虫、表壳虫。

youdao

In fact, because a large part of China is inaccessible and inhospitable, the density in the main population centres is much higher than those figures suggest.

事实上，因为有中国的很大一部分土地交通不便且荒凉的，主要人口中心的密度远远高于这些数字所显示的。

youdao

While Libyan forces have some presence in the country's main population centers, large desert areas are controlled by a patchwork of tribes.

WSJ: Militants, Chased From Mali, Pose New Threats

The BBC's Mark Doyle, in Bandiagara, some 320km (200 miles) south of Timbuktu, says there is still great fear among the people outside of the main population centres.

BBC: French-led troops secure hold on Timbuktu

EU, lies to the east of Turkey's main population centres.

ECONOMIST: Turkey and the EU