find an expression for

例句：

1. 1. I found the book in the library.
   我在图书馆里找到了这本书。
2. 2. She discovered the truth through her research.
   她通过研究发现了真相。
3. 3. The detective was able to identify the culprit.
   侦探能够确定罪犯的身份。