VOA慢速英语2014.05.26
[audio]http://sound.yywz123.com/tingbbs/voa/voa20140526.mp3[/audio]The treated nets block female mosquitoes from securing blood, which is necessary for them to reproduce. The insecticide also cuts the life of the insects in half.处理过的蚊帐可以防止雌性蚊子吸血,这是它们繁殖的必要条件.杀虫剂也将这些蚊虫的寿命缩减了一半.
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