'wherein' in which: The industry will have a situation wherein many companies will be unable to afford to stay in business. He gazed once more around the room, wherein were assembled his entire family. 'therein' in that place; in him/her/it: It is a thrilling tale of a haunted house and the ghosts therein. Therein lies the risk. (Here is the risk)

老哥你好 简单的来说，一般上"wherein" 这个单词的意思跟 "in which" 差不多。然后 “therein” 的一些平常的含义是 “in that regard” 或 “in that place” 或 “in that circumstance”。我举例下- “This is the house wherein my great grandfather lived” “A situation wherein you would use this word” 哈哈 “I trusted her, and therein lies my biggest mistake” 有问题的话可以来问我。