21. Recognizes that many developing countries as well as countries with economies in transition need to be assisted in the formulation and implementation of national strategies and programmes for sustainable mountain development, through bilateral, multilateral and South-South cooperation, as well as through other forms of collaborative approaches;
21. 确认许多发展中国家和经济转型国家在制订和执行国家山区可持续发展战略和方案时，需要各方通过双边、多边和南南合作以及其他协作形式提供协助；