The Andes are separated into three natural regions: the southern, central, and northern regions.

安第斯山脉被分成三个自然生态区：南部，中部以及北部。

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They are separated by, and connected to, amorphous regions.

它们由非晶区分开并联接。

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Firstly, a gradient operator based on local standard deviation is performed and potential edge regions are well separated.

首先提出了一种基于标准差的梯度算子，将图像中潜在的边缘区域很好地区分出来；

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The United States needed to consider the possibility of involvement in conflicts in two widely separated regions of the globe as well as sorties by major adversaries against the East and West Coasts.

CENTERFORSECURITYPOLICY: Center for Security Policy | The Measure of a Superpower: A Two Major Regional Contingency Military for the 21st Century | Page: 2