单词：ecological valency
单词：ecological valency 相关文章
Italian environmental officials are warning of an ecological disaster in Italy caused by an oil spill flowing down the Po River. They say water and bird species are at risk, as well as a fertile agricultural area. The say the oill spill has already c
VOA标准英语2010年(二月)
In an effort to protect the ecological environment along the Yangtze River, officials in Hubei's capital Wuhan have taken a series of measures to regulate the wharves along shore. CRI's reporter Huang Yue has more. In late December, the average low i
2018CRI中国国际广播电台
Broadcast: Mar 21, 2003 Britain's military chief says coalition forces have seized Iraq's key southern oil facilities, apparently averting what could have been a major ecological disaster. British mil
VOA2003（上）-科技先知
A report by a number of leading conservation groups warns that unless prompt corrective measures are taken, the planet is heading toward an ecological credit crunch. For VOA, Tom Rivers reports from London. Cover of the Living Planet Report The repo
VOA标准英语2008年（十月）
Ecological Footprint Africas ecological footprint is getting bigger. The continents growing population is placing greater demand on its natural resources. A new report calls on African nations to adopt a more sustainable approach to development to en
VOA标准英语2012年(六月)
Sierra Leone is working to preserve the ecosystem of coastal mangrove swamps that are threatened by people collecting firewood and harvesting salt. Harvesting salt along the coast of West Africa is an age-old business. But today conservationists say
VOA标准英语2010年(三月)