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句子中得成分不是很理解.求高手、、、、

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句子中得成分不是很理解.求高手、、、、
As many as four-fifths of  all the cells in the electric eel's body are specialized for generating electricity,and the strength of the shock it can deliver corresponds roughly to the length of this body.   

 it can deliver corresponds roughly  .deliver与corresponds在这句话里怎么理解两个动词?
句子中得成分不是很理解.求高手、、、、
电鳗体内的所有细胞中有多达五分之四是专门用来发电的,而它能够提供的电击强度大致对应于此电鳗身体的长度.
it can deliver 是定语从句,修饰 the strength of the shock (电击的强度),the strength of the shock 是主句的主语,谓语是corresponds,deliver是定语从句的谓语动词.