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Topic1-Nine years after the plastic-bag ban In 2008, China initiated a national ban on the use of free plastic bags in supermarkets. 9 years later, the effectiveness of the ban is under fire. Environmentalists, congressional delegates, and even state
英语角-圆桌会议
optimal effectiveness 最大成效 英文释义 An expression describing a condition in whichoperations are at their most efficient 例句 Some managers believe that six is the right number of members on a work team for optimaleffectiveness.有些经理
每日商务英语
By Jessica Berman Washington 27 November 2007 Endemic cholera, a potentially fatal diarrheal disease found in the world's poorest countries, could be effectively controlled by orally vaccinating half of the affected populations once every two years f
VOA常速英语2007年（十一月）
One of the biggest challenges in fighting tuberculosis comes from new drug-resistant(抗药性的) strains of the disease. And one of the main reason those strains have developed is that TB patients often don't take their standard, 14-pill, course of
英语新闻
今天我们要学的词是untested。 Untested, 没有经过测试的，没有经过考验的。最近，香港和印度等亚洲地区陆续发现禽流感。为了预防禽流感对人类的威胁， Several human vaccines for bird flu have been d
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