6. Encourages countries to present, on a voluntary basis, in particular at the Commission's review sessions, national reports focusing on concrete progress in implementation, including achievements, constraints, challenges and opportunities;
6. 鼓励各国向委员会审查会议等机制自愿提交国家报告，重点阐述在执行工作中所取得的具体进展，包括成就、制约、挑战和机遇；