音标:['kætәlɔid] ;
胶体二氧化硅

C Caffeic acid 咖啡酸 Caffeine 咖啡碱 Calcium Citrate (Tricalcium citrate) 柠檬酸钙 Calcium Malate 苹果酸钙 (+)-Camphor 樟脑 Camptothecine 喜树碱 Cantharidin 斑蟊素 Capillarisin 茵

发表于:2019-01-03 / 阅读(41) / 评论(0) 分类 医务英语

By Jessica Berman Washington 25 January 2006 Researchers have long observed that during times of social stress, there are fewer male births than female births. Now, a new study has found that boys bor

发表于:2019-01-06 / 阅读(113) / 评论(0) 分类 2006年VOA标准英语(一月)

By June Soh Washington, D.C. 17 October 2006 watch Youngest Imam report Two teenagers who used to spend their time playing computer games after school are suddenly finding themselves as spiritual leaders. Their role relieves a U.S. Muslim community'

发表于:2019-02-06 / 阅读(99) / 评论(0) 分类 2006年VOA标准英语(十月)
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