I like the books, one of which is written by Trolstoy.
我喜欢书,其中一本是托尔斯泰写的.
I like the book, the one of which all of us are fond.
我喜欢书,就是我们都喜欢的那本.
one of which 被修饰的主词是复数,“其中之一”的意思
the one of which 被修饰的主词是单数, “就是那个”的意思.