CNN news 2011-01-10 加文本

on behalf of代表…

例句：At the airport he read an address of welcome on behalf of the association.
      在机场上他代表该协会致了欢迎词。

      I'm writing on behalf of my mother to express her thanks for your gift.
      我代表我母亲写信, 对你的礼物表示感谢。

2.And there's probably different causes for Autisms, what we're trying to find out is what are some of those causes and so you have to look at the science over time so you follow where the science lead to immunizations, then we would have followed down the path.

lead to(道路)通向

例句：All roads lead to Rome.
       条条道路通罗马。

3.Two million spot fish,most of them are young have been piling up on the shores.

pile up(使)成为一堆; 堆积

例句：The clouds are piling up.
      云愈积愈密。

      He piled up fallen leaves in a corner of the yard.
      他把落叶堆积在院子一角。