Energy is essential to human survival and development, and the way we develop low-carbon energy will be of great significance to the future of humanity. Since the First Industrial Revolution, the extensive use of fossil fuels has propelled human pr...
时间先后: now, later, before, after, since, when, first, second, next, at last, eventually, finally 排列次序: another, the secondeven morethe most the best the least 在词下...
BOGOTA - Emptying the bins of Colombia's capital, Jose Alberto Gutierrez one day found a copy of the classic novel Anna Karenina and kept it.
the rate for the 55- to 64-year-olds who were going to college more than 30 years ago. Studies show that more and more poor and non-white students want to graduate from college – but their graduation rates fall far short of their dreams. The gradu...
Mr. Koziatek is part of something pioneering. He is a teacher at a New Hampshire high school where learning is not something of books and tests and mechanical memorization,...
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