During the fourth session of the Commission on Sustainable Development acting as the preparatory committee for the World Summit on Sustainable Development, four main official activities will be held, as described in sections I to IV below.
1．如下面第一至四节所述,在作为可持续发展问题世界首脑会议筹备委员会的可持续发展委员会第四届会议期间,将举行四项主要正式活动。