来源:http://www.bbc.co.uk/worldservice/learningenglish/language/wordsinthenews/2012/07/120730_witn_usa_food.shtml
- drought
-
long period of dry weather leading to water shortages
withered -
dried out and shrivelled
staple crops -
most important foods
irrigated -
watered by using pipes, ditches and streams
a bumper year -
a larger than usual period of growing
projections -
estimates or forecasts
exports -
sent to other countries
dramatically -
in a big way