单词:diacetyl acetone
[化] 二乙酰基丙酮; 庚间三酮
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Ugandan President Chastises Universities Over 'Non-Marketable' Classes Uganda's universities normally face leadership challenges but now they face a challenge from the country's leader. In speeches across the country, Ugandan President Yoweri Museven
发表于:2019-01-13 / 阅读(36) / 评论(0)
VOA标准英语2011年(十二月)