单词:reactive aluminium in the vermont soil test
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This is scientific Americans 60 second science,I'm Cynthia Graber.This will just take a minute.A coal mine can decrease the local environment but a Fungi may indivertantly help cleanup the mine with its own waste products. Researchers worked with the
HEALTH REPORT – December 4, 2002: Test Warns of Heart Attack Risk By Jerilyn Watson This is the VOA Special English Health Report. Since the nineteen-fifties, American doctors have tested their pati
英语美文-主动与被动语言的重要性 语言是表达自我,交流十分重要的途径。一个人的语言能传达很多信息,包括一个人的性格,思维,态度,生活环境,经历,职业等等。很多时候,我们作为
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Editor's Note: This story is part of a continuing series about international student life at colleges and universities across the United States. Please join us over the next several weeks as we bring you stories about international students and the A
Hopes for a colony on Mars took a step forward after scientists proved it was possible to grow edible food in Martian soil for the first time. 殖民火星的希望向前迈进了一步:科学家首次证实在火星土壤上是有可能种出可食用