Exactly how these urban heat islands affect global temperatures, however, has been unclear.

这些热岛效应如何影响全球温度还不清楚。

youdao

A downside to urbanisation is that cities are hotter than the surrounding countryside, creating what meteorologists call “urban heat islands”.

城市化美中不足的是，城市会比相邻的乡村更加炎热，产生气象学家所谓的“都市热岛效应”。

youdao

Though the city was built long before the concept of urban heat islands came into being, I can't help but wonder if the white paint has helped generations of Colombians to beat the tropical heat.

尽管波帕扬在“城市热岛”的概念出现以前，就早已建成，但我还是迫不及待地想要知道，这座白色之城，是否真的能够帮助哥伦比亚的代代子民，对抗当地酷热的气候。

youdao

Altering the balance of energy has created what Bornstein calls "urban heat islands" where the temperature is 5 to 10 degrees hotter than outlying areas and generate their own rain.

CNN: In-Depth Specials - City Limits

"These initial findings are very encouraging and echo our own results and our conclusion that the impact of urban heat islands on the overall global temperature is minimal, " Jones said in a statement.

CNN: New climate study deals blow to skeptics