CNN news 2009-12-28 加文本

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例句：a festive occasion
      喜庆的场合

      It was Christmas and everyone was in festive mood.
      当时是圣诞节，每个人都沉浸在节日的欢乐中。

2.back drop 背景;干扰

3.put on the back burner搁置

例句：Dozens of cases were put on the back burner.
      大量的案件被搁置起来。

4.conservative adj.保守的, 守旧的

例句：The professor's a radical in politics but a conservative dresser.
       教授在政治上是激进派, 但衣着却很守旧。