VOA慢速英语:Demand for Wheat Growing in Sub-Saharan Africa

短语讲解：

1. Another problem is that Africa’s wheat farms were often far from population centers.

far from 远离；远非
例句：It's far from perfect. 
那还远远算不上完善。 

2. It’s easy to process and you also can store it for a few days, which is different from some of the maize and rice products.

be different  from
例句：Their school is different from ours.
他们的学校与我们的不同。

3. In addition, railroads and roads would have to be improved so large amounts of wheat could be moved to large markets.

in addition 并且；况且
例句：In addition, I paid 100 yuan.
另外我又付了一百元。

4. Those imports are expected to cost eighteen billion dollars.

be expected to 期待
例句：The company is expected to report record profits this year.
今年公司有望获得创纪录的利润。