For almost three decades, sustainable development has been defined as development that meets the needs of the present, without compromising future generations’ ability to meet their needs. Related policies have reflected the view that sustainable development rests on three equal pillars: the economy, society, and the environment.
近三十年来，可持续发展的定义一直是：既满足当前需求，又兼顾子孙后代满足他们的需求的能力的发展。相关政策表明，可持续发展有三大基石：经济、社会和环境。