求翻译：在环境和可持续发展领域，加强南南合作非常重要，因为这些国家国情相同或类似，可相互学习和借鉴的经验很多，而发达国家的经验对这些国家往往是不适用的。另一方面，援助国或机构帮助一个发展中国家制定或落实环境计划，往往不雇用本地的专家，对某些国家来说，这些人的费用是一笔沉重的负担。对此，达斯古普塔建议国际社会倡导一带二的合作方式，即由一个发达国家或机构帮助两个国情相同或基本相同的发展中国家，一方面减轻受援国的负担，另一方面，成效也更为明显。总之，发达国家应为全球环境保护承担更多责任。是什么意思？

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In the field of environment and sustainable development, and strengthening South-South cooperation is very important, because these countries same or similar conditions, we can learn from each other and learn from the experience, the experience of developed countries to these are the countries that

In the field of environment and sustainable development, strengthening South-South cooperation is very important, because these same or similar national conditions, learning from each other and draw on the experience of many, to these countries and the experience of developed countries are often not