VOA慢速英语:Bringing Light to Homes in Poor Countries

例句：The castle will undergo extensive and costly renovations.
       那城堡要用钜资进行全面整修。

      The general's decision to invade was a costly mistake.
      将军作出的入侵决定是个代价惨重的错误。

2.affordable adj.提供得起的

例句：The board's decision to split the stock made it more affordable.
      董事会决定分股，以降低股票价格。

还记得前两天新闻中出现的美国一个计划吗？也是用到affordalbe这个词：“居者有其屋”（Making Home Affordable）

3.renewable a.可更新的;可恢复的

例句：The expert calculated that renewable energy will cost far less than previously thought.
      这位专家预测，可再生能源的成本会远远低于之前的预期。

4.equip vt.为…配备

例句：The plane's equipped for ail-weather fly.
      这架飞机的装备可作全天候飞行。

5.hiking n.徒步旅行

例句：You can hike in the mountains, In a forest or along a rive.
      你可以到山里、森林里或沿河边旅行。