美国绿色建筑委员会(USGBC)今日正式发布LEED v5评级体系，对其旗舰级LEED(能源与环境设计先锋)绿色建筑
认证系统进行全面升级，新版标准将更聚焦可持续性建筑指标。
英文原文如下：
USGBC Launches New Sustainable Buildings LEED Rating System
The U.S. Green Building Council (USGBC) announced today the launch of LEED v5, updating its flagship LEED (Leadership in Energy and Environmental Design) green building system for rating with a sustainability-focused building standard.
