wherein
adverb, conjunction old use or formal uk/weəˈrɪn/ us/werˈɪn/
在哪方面，在哪里
in which, or in which part
He gazed once more around the room, wherein were assembled his entire family. 他再一次环视房间，他全家人都在那里。
He was certainly a pleasant man but wherein lay his charms, she wondered. 他无疑是个讨人喜欢的人，但她不知他的魅力何在。