首先我们来看下of which、in which和among which的大致意思：
of which：词性为介词短语，of which 由介词 of 和关系代词 which 构成。
in which：词性为介词短语，in which 由介词 in 和关系代词 which 构成。
among which：词性为介词短语，among which 由介词 among 和关系代词 which 构成。
通过下面的表格我们了解下of which、in which和among which的含义、发音和用法
接下来让我们看下of which、in which和among which的用法区别：
1.用法：of which 引导的定语从句通常是描述性质、特点或归属关系；而 in which 引导的定语从句则是描述地点或情况；among which 引导的定语从句则是描述在一群或一系列事物中的某个。
例子：
- I read all the books, some of which are very interesting.
(我看了所有的书，其中有几本非常有趣。)
- I love this city, in which I have lived for many years.
(我喜欢这个城市，在其中生活了很多年。)
- I visited many museums, among which one is very fascinating.
(我参观了很多博物馆，其中有一个非常精彩。)
2.定位词：of which 在句子中通常作为定位词出现，放置在先行词后面；in which 则是在句中作为定位词，放置在定语从句的开头；among which 也是作为定位词，放置在先行词后面。
例子：
- I read many novels, some of which are very interesting.
(我读了很多小说，其中几本非常有趣。)
- I visited many famous landmarks, in which one is very well-known.
(我参观了很多名胜古迹，在其中有一座非常著名。)
- I went to different countries, among which one is very beautiful.
(我去了不同的国家，其中有一个非常美丽。)
3.数量：of which 引导的定语从句通常表示多个中的一部分或者特定的一个；in which 引导的定语从句通常表示一个具体的地点或情况；among which 引导的定语从句通常表示在一群或一组事物中的某个。
例子：
- There are many flowers in this room, one of which is my favorite.
(这间屋子里有很多花，其中一朵是我的最爱。)
- There are many books in the library, one of which is what I want.
(图书馆里有很多书，其中一本是我想要的。)
- There are many tasks in this project, one of which is very important.
(这个项目中有很多任务，其中一个非常重要。)
4.句子结构：of which 引导的定语从句通常位于句子的后半部分；in which 引导的定语从句通常位于句子的后半部分；among which 引导的定语从句通常位于句子的后半部分。
例子：
- I bought many clothes, one of which is red.
(我买了很多衣服，其中一件是红色的。)
- We organized many events, among which one is a concert.
(我们举办了很多活动，在其中有一个是音乐会。)
- The company made many decisions, one of which is layoffs.
(公司做了很多决定，其中一个是裁员。)