VOA慢速英语:Feed the Soil, Feed the Crops

1. Mr. Reganold says poor soil may have resulted from years of weathering that washed away many nutrients.

result from 由于
例句：Nothing will result from their airy plans.
他们那些不切实际的计划不会有什么结果。

2. The method is gaining widespread use in countries such as Niger, Burkina Faso, Malawi and Zambia.

such as 诸如
例句：Fuels such as coal or oil.
诸如煤或石油之类的燃料。

3. They not only add nitrogen to the soil through their roots,  through their leaves when they fall off and break down.

not only...but (also) 不但...而且...
例句：These not only help in presentation but also help orient users. 
这不仅有助于表达，而且可以帮助使用者在创建时更好地定位。 
break down 损坏
例句：What guarantee do I have that it won't break down easily? 
有什么保障它不会轻易出故障？