VOA慢速英语:One-Hour Blackout to go Green

例句：pedantic observance of the rules
      墨守成规

      The speaker advocated a less austere observance of the Sabbath.
      演讲者倡导放宽安息日的严格规定。

2.territory n.（个人、群体、动物等占据的）领域，管区，地盘

例句：As the company's northern sales manager I'm responsible for quite a large territory.
      作为公司的北方销售经理, 我负责相当大的一片地区。

3.footprint n.足迹

例句：The footprints put the police on the scent.
      警察沿着脚印跟踪追捕。

4.conservation n.对自然环境的保护

例句：She is interested in conservation.
      她对保护环境这个问题十分关心。