They come from tropical Africa, Southeast Asia, Central and South America.

它们有的来自热带非洲，有的来自东南亚，还有的来自中美洲和南美洲。

The bronze age emerged relatively early in Western and Central Asia.

西亚和中亚更早具备铸铜技术。

They live in Africa, Asia, Central and South America, and on small islands and in the Arctic.

他们生活在非洲、亚洲、中美洲和南美洲，一些岛上和北极。

The U.S. believes CASA-1000 can be a potentially transformative project, helping create a regional energy grid that connects Central and South Asia for the first time.

美国认为该项目有成为变革性项目的潜力，能建设第一个连接中亚和南亚的地区的能源网。