在可持续农业技术国际研讨会开幕式上的讲话国家科学技术委员会副主任韩德乾女士们、先生们：环境与发展，是当今国际社会普遍关注的重大问题。本世纪以来，由于科技进步和社会生产力的极大提高，人类创造了前所未有的物质财富和加速了社会文明的进程，但人口剧增、资源过... Speech at the opening ceremony of the International Symposium on Sustainable Agricultural Technologies Ms. Han Degan, Deputy Director of the National Committee for Science and Technology Ladies and gentlemen, Environment and development are major issues of general concern to the international community today. Since the beginning of this century, humankind has created an unprecedented material wealth and accelerated the process of social civilization because of the advancement of science and technology and the great improvement of social productive forces.