VOA慢速英语2012.05.07
[audio]http://sound.yywz123.com/tingbbs/voa/voa20120507.mp3[/audio]That means farmers do not need to spray a whole field. Instead there is a little bit of insecticide inside each plant -- including the pollen and nectar that the bees want.这意味着，农民不必在整块田地里喷洒农药了。而每棵植株里只有少量杀虫剂，蜜蜂需要的花粉和花蜜里也有。
_____________________________________________________________.
**** Hidden Message ***** 下载 There is not enough pestiside to kill them, but the new research in the journal sciense says it may harm them anyway. There is not enough pesticide to kill them.But a new research in the journal Science says it may harm then anyway Bees add an estimated eighteen billion dollars a year to the value of American crops. They pollinate flowers that become fruits, nuts and vegetables.蜜蜂每年给美国农作物带来大约180亿美元的收益。 它们授粉过的花会长成水果、坚果和蔬菜。_____________________________________________________.
本帖隐藏的内容需要回复才可以浏览
But, in recent years, honeybee colonies in the United States and Europe have been shrinking. Scientists have proposed different theories to explain what is known as colony collapse disorder.但是，近几年来，美国和欧洲的蜂群一直在减少。科学家们提出了各种各样的理论来解释这个被称为蜂群衰竭失调的现象。
页:
[1]