VOA慢速英语:Events Set Around the World as Earth Day Turns 40

例句：a growing awareness of healthy living
      不断增强的健康生活的意识

      Environmental awareness has increased over the years.
      这些年来人们的环境意识增强了。

2.march vi.进军; 行进；齐步走

例句：The crowd of demonstrators marched along the main street.
      游行群众沿主要街道行进。

3.supervision n.监督, 管理

例句：The work was done under my supervision.
      这项工作是在我的监督之下完成的。

4.ensure vt.确保, 担保

例句：I will ensure that the car arrives by six o'clock.
      我保证汽车六点钟以前到。