VOA慢速英语2014.03.13
[audio]http://sound.yywz123.com/tingbbs/voa/voa20140313.mp3[/audio]Irrigation systems can make a big difference in agricultural production. Irrigation can also improve the lives of farm families. 灌溉系统在农业生产中能产生巨大差异.灌溉也能改善农民家庭的生活.
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