VOA慢速英语:Scientists Document Effects of Market Policy Changes on Three West African Countries

例句：Some kinds of manual labour have been replaced by machines.
      有一些体力劳动已为机器所取代。

2.largely adv.在很大程度上, 大半地, 主要地

例句：This country is largely desert.
      这个国家大半都是沙漠。

      His success is largely due to his own hard work.
      他的成功主要是靠他自己的努力。

3.costly a.昂贵的,豪华的,价值高的

例句：It is less costly to freight merchandise than to mail it.
      货运商品比邮寄省钱。

4.unlike prep.(表示属性)与…不像, 与…不同; 非…的特点

例句：She's very unlike her mother.
      她一点也不像她母亲。

      It's unlike him to be late; he's usually on time.
      他不是会迟到的那种人, 他通常很准时。

5.suggest vt.建议, 提议

例句：They accepted the paper and suggested only one change.
      他们接受了这篇论文, 只提出改动一个地方。

6.barrier n.障碍, 隔阂

例句：Lack of confidence is the biggest barrier to investment in the region.
      缺乏信心是在这一地区投资的最大障碍。

7.process vt.加工; 处理

例句：The factory processes leather.
      这个厂加工皮革。

      How fast does the computer process the data?
      这台计算机处理数据有多快?