单词:bioassary
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蒋健棠听说学英语 Chapter16:The wildlife biologist
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By Mario Ritter Broadcast: October 28, 2003 This is Steve Ember with the VOA Special English Agriculture Report. Farmers have long put animal waste on their fields. They may also use human waste. Mode
As Aesop's lion was going to the forest in company with an ass,who was to assist him with his terrible voice,an impertinent crow called to him from a tree:A pretty companion!Are you not ashamed of yourself to be walking with an ass?Whomsoev
An ass and an ox,fastened to the same yoke,were draging a waggon.While the ox was pulling with all his might he he broke a horn.The ass swore that he had got no help whatever from his weak companion.Exerting himself in the labour,the ox b
俄罗斯莫斯科的一位生物能量学教授近日宣布,他已研制出一种能够有效延缓衰老的不老药,并有望于几年内上架销售。这位科学家用40年的时间研制出一种抗氧化剂,能够有效抑制氧分子对人