VOA慢速英语:India Celebrates 50th Anniversary for Rice That Prevented Famines

1. increase vt.增加，增大，增多
例句：The population continues to increase
人口继续增长。

2. fertilizer n.肥料，化肥; 受精媒介物
例句：The state allotted them large quantities of chemical fertilizer.
国家给他们调拨了大量化肥。

3. increase vt.增加，增大，增多
例句：He exhorted his workers to increase production.
他力劝自己的工人增加生产。

4. struggle vi. 奋斗; 搏斗; 努力
例句：They had to struggle against all kinds of adversity
他们不得不同一切困境做斗争。

5. irrigate vt. 灌溉; 冲洗（伤口）; 使清新
例句：None of the water from Lake Powell is used to irrigate the area.
鲍威尔湖的水一滴都没有用于灌溉该地区。

6. decrease n. 减少，减小; 减少量
例句：Population growth is decreasing by 1.4% each year
人口增长率正在以每年1.4%的速度下降。

7. improve vt.提高（土地、地产）的价值; 利用（机会）; 改善
例句: His manners will improve with age.
随着年龄的增长,他的举止是会逐渐改进的。

8. challenge n. 挑战; 质疑; 盘问; 怀疑
例句：I like a big challenge and they don't come much bigger than this
我喜欢大的挑战，而所有挑战中再没有比这更大的了。