However, the core zone in the city shantytowns gradually disappears.

然而，就在城市核心地带的棚户区逐渐消失的时候。

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Under the strictest protection measures, vegetation in the core zone appeared to be highly stable and had been further improved.

在绝对保护措施下，核心区植被稳定性高并得到进一步改善。

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In order to relieve the habitat pressure of coastal birds, it is necessary to build waterfowl ponds at the edge of the core zone.

为了减轻由于湿地开发带来的珍禽的生境压力，在核心区的边缘必须建立以招鸟为目的的水禽湖。

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The Core Zone and the Buffer Zone are subject to separate joint venture agreements.

FORBES: Harry Winston to Purchase Ekati Diamond Mine For $500 Million

Over that period sales from the Core Zone represented approximately 6 percent of world rough diamond supply by value.

FORBES: Harry Winston to Purchase Ekati Diamond Mine For $500 Million

The Ekati Diamond Mine, located in the Northwest Territories of Canada, consists of the Core Zone, which includes the current operating mine and other permitted kimberlite pipes, as well as the Buffer Zone, an adjacent area hosting kimberlite pipes having both development and exploration potential.

FORBES: Harry Winston to Purchase Ekati Diamond Mine For $500 Million