一个英语单词可分为三部分:前缀(prefix)词根(root)后缀(suffix)。位于词根前面的部分就是前缀。前缀,可以改变单词的意思。 carb-, carbo- 表示碳 carbon = carb + on n. 碳 carbohydrate = carbo + h

发表于:2018-12-19 / 阅读(57) / 评论(0) 分类 英语PK台

Australia's bold plans for a carbon emissions trading scheme are under threat after the conservative opposition in Canberra hardened its stance against it. Critics of Prime Minister Kevin Rudd's proposal say it would cost jobs and provoke economic u

发表于:2019-01-11 / 阅读(57) / 评论(0) 分类 VOA标准英语2009年(五月)