单词：net energy for production
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by Jason Marshall In past articles weve talked at length about three of the big four traditional processes used in basic arithmetic: addition (see also How to Add Quickly), subtraction, and division. However, for one reason or another, we havent yet
数学英语
Global Foods Vie for US Market Mame Diene remembers the ancient baobab tree in the courtyard of her family home. As a child, she was not allowed to climb it or cut its branches. Now, she honors these trees of Senegal by selling their powder as a natu
VOA标准英语2012年(六月)
A new strategic plan for AIDS vaccine research was unveiled Tuesday. Its the culmination of an 18-month effort that included the input of 400 scientists worldwide. The new Scientific Strategic Plan developed by the Council of the Global HIV Vaccine E
VOA标准英语2010年(九)月
Guterres and the Chinese Foreign Minister Wang Yi held talks on Monday morning. This was at the invitation of the Chinese government, which aims to further enhance the mutual trust and map out the future development between the two sides. During the
2016CRI中国国际广播电台
When I was a kid I was top of the class in maths. I was really good at mental arithmetic and doing sums. Things were easy back then, It was all addition and subtraction, multiplication and division. I knew my times tables like the back of my hand. Th
纯正英语一分钟
But when they really get pushy, people really get pushy, I say, I do it because you do it for your kid. 但是当他们变得有进取心时，我们就会变得更有进取心，我说：我这样做就像你们为自己的儿子做的原因一样。
TED演讲国际问题篇