求翻译：当资源储量逐渐降低时，单位资源的开发成本不断增大，当储量低到一定水平时，成本大于价格时，厂商将选择不开发，此时该资源的市场供给为0是什么意思？

When the reserves gradually decreases, the unit cost of increasing resource development, when reserves are low to a certain level, the cost is greater than the price, manufacturers will choose not to develop, then the market supply of resources 0

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When the reserves gradually decreases, the Organizer resource development costs continue to increase, when reserves are low enough levels, when the cost is greater than the price, the manufacturer will choose not to develop, in which case the market supply of resources for 0

When the resource reserves reduce gradually, the development cost of unit resources is increasing constantly, when the reserves are so low that sure and horizontal, when the cost is greater than prices, the manufacturer will choose not to develop, the market of this resource supplies as 0 at this mo