单词：self-commutated convertor
单词：self-commutated convertor 相关文章
Scientists Getting Closer to Finding AIDS Cure 科学家治愈艾滋病的希望更大了 Scientists searching for a cure for AIDS say they have uncovered the basic chemistry of the HIV virus and that the most likely strategy for fighting the disease
VOA标准英语2014年(十二月)
This is Scientific Americans 60-Second Science. Im Steve Mirsky. Got a minute? Generations of American children have been told, Eat your broccoli! And for decades, researchers have known that broccoli and related vegetables like cauliflower and water
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2016年VOA慢速英语(十一)月
By Carol Pearson Washington, D.C. 22 June 2007 Studies show that women with a strong family history of breast cancer -- meaning their mothers, sisters, aunts or grandmothers had the disease -- have a higher risk of getting breast cancer, too. But a
2007年VOA标准英语（六月）