VOA慢速英语:Increasing Food Security in Dry Areas of the Middle East

例句：He is doing household chores.
      他正在做家务。

2.select v.选择; 挑选；选拔

例句：They selected a diamond engagement ring.
      他们挑选了一枚钻石订婚戒指。

      Which place in the world would you select as your perfect home?
      你选择世界上的什么地方作为你最理想的安家之地呢?

3.homogeneous adj.同性质的, 同类的

例句：They are homogeneous people.
      他们是同类人。

4.maximize vt.使(某事物)增至最大限度

例句：We will actively manage your portfolio to maximize the return on your investment.
      我们会积极管理您的投资组合，使您获得最大的投资回报。

5.require vt.有赖于…; 需要

例句：All living beings require food.
      一切生物都需要食物。

例句：The problem requires dealing with immediately.
      这个问题要马上处理。

6.shortage n.缺乏,不足

例句：The war was lost because of a shortage of munitions.
      战争因军火短缺而失败了