一个很有挑战性的句子,

来源：学生作业帮编辑：拍题作业网作业帮分类：英语作业时间：2024/04/29 08:18:22

一个很有挑战性的句子,
Experts in marine life say that there is a closer relationship between dolphin and man-eating sharks than had been previously thought.
这个句子中 than had been previously thought.它的语法结构是什么.它跟整个句子看起来很不协调啊.希望有人能回答下,

是这样的,这句话的意思是“海洋生物专家现在认为海豚和食人鲨之间的关系比我们以前认为的还要近.”
than had been previously thought其实是一句省略句,如果全说出来就是
"Experts in marine life say that there is a closer relationship between dolphin and man-eating sharks than EXPERTS IN MARINE LIFE had been previously thought."
现在你明白啦?其实就是把从句中的主语省略了,为什么可以这样省略呢?是因为和句首的主语重复了.

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