VOA慢速英语:Vietnam's Big Year for Coffee, Rice Exports

1. expand vt. 使……变大；扩张
例句：I want to expand the medical program and the recreation program. 
我要扩充医药工作和康乐活动。 

2. policy n. 政策
例句：Economic policy is liberalized to encourage initiatives in production.
放宽经济政策以鼓励生产的积极性。  
 
3. harvest n. 收获
例句：After the harvest, the ranches seemed asleep. 
收获期一过农庄就仿佛入睡了。 

4. change vt. 改变
例句：At this point, your goals change. 
这时他的目标发生了变化。 

5. improve vt. 提高
例句：Technical advances improve productivity. 
技术进步提高生产力。 

6. efficiency n. 效率
例句：He innovated a plan for increased efficiency. 
他引进提高效率的 (新) 方案。