The researchers say that the growth of cities in Africa may further increase the risk of dengue.

研究人员表示，非洲城市的增长可能进一步增加登革热的风险。

Frey says the growth of cities 10 years ago resulted from the Great Recession of 2008 and 2009.

弗雷说，10年前城市人口的增长是2008年和2009年的大衰退所致。

The changing conditions of American life, marked by the spreading mill towns of New England, New York, and Pennsylvania and the growth of cities like Buffalo, Cincinnati, Louisville, St.

——美国生活条件的变化，以新英格兰、纽约和宾夕法尼亚的工厂城镇的扩张以及布法罗、辛辛那提、路易斯维尔、圣路易斯等城市的发展为标志。

The fast growth of cities has reduced habitat for macaques, a species with the widest habitat reach in the world. This reduction has caused the animal to hunt for food where humans live and work.

城市的快速发展减少了猕猴的栖息地，猕猴是世界上栖息地最广的物种。栖息地的减少导致了动物在人类生活和工作的地方寻找食物。

While some argue that this is a positive development, as it contributes to the growth of cities, others see it as a negative development, as it causes environmental degradation and the loss of green spaces.

一些人认为这是一种积极的发展，因为它有助于城市的发展，而另一些人则认为这是一种消极的发展，因为它会导致环境退化和绿色空间的丧失。