(=unidentified growth factor) 未确认的生长因子, 未辨明的生长因子

Study: Rats Pose Plague Risk in Croplands Efforts to boost food production in East Africa may increase the risk of plague. A new study says the conversion of natural lands into croplands in Tanzania has been accompanied by a large increase in the rod

发表于:2018-12-16 / 阅读(34) / 评论(0) 分类 VOA标准英语2015年(二月)

今天讨论的话题与农业有关。什么是主要粮食作物? Alice: Hello, I'm Alice. Yvonne: And I'm Yvonne. Alice: And this is 6 Minute English! And in todays programme were talking about farming in Africa. Yvonne: The study of farming is

发表于:2018-12-27 / 阅读(48) / 评论(0) 分类 一起听英语

A new international initiative to increase grain crop yields could help raise incomes for six million farmers in South Asia and combat hunger in one of the poorest regions of the world. Indian farmer women winnow mustard crop at Baraikapurva village

发表于:2019-01-13 / 阅读(51) / 评论(0) 分类 VOA标准英语2009年(一月)

21. That matters because theory suggests that the maximum sustainable yield that can be cropped from a fishery comes when the biomass of a target species is about 50% of its original levels. 【分析】多重复合句。句子主干为That matters。

发表于:2019-01-16 / 阅读(63) / 评论(0) 分类 考研英语长难句讲解

Voice 1 Thank you for joining us for todays Spotlight. Im Courtney Schutt. Voice 2 And Im Ryan Geertsma. Spotlight uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 I

发表于:2019-01-19 / 阅读(34) / 评论(0) 分类 环球英语 Spotlight

Scientists have now started to breed drought resistant crops which they hope will combat East Africa's worst drought in 60 years. More than 13 million people across Africa are facing severe food shortages. But as CRI's Su Yi reports, a new strain of

发表于:2019-02-14 / 阅读(52) / 评论(0) 分类 世界各地新闻集锦