1)這個句子的主干是：Asimov had both an extraordinary imagination and an amazing mind.
即阿西莫夫不僅有非凡的想象力,也有令人吃驚的智力.
這里had是has的過去式,both...and...相當(dāng)于not only...but also.
2)that gave him the ability to explore future words這是定語從句,修飾imagination,意為他非凡的想象力可以使他探究未來的訊息.
3)with which he searched for explanations of everything,in the present and the past這也是定語從句,修飾mind,意為他令人吃驚的智力可以使他解釋現(xiàn)在和過去所發(fā)生的一切.
這里with which是定語從句中的常用結(jié)構(gòu),例如
I have a knife with which i can peel apples.我有一把可以削蘋果的刀子.
4)全句意為：阿西莫夫想象力非凡,他可以探究未來的訊息,智力也很讓人吃驚,他可以解釋現(xiàn)在和過去所發(fā)生的一切.