trace to its source

例句：

1. 1. I'm trying to trace the origin of this problem.
   我正在试图追溯这个问题的根源。
2. 2. The detective traced the thief to his hideout.
   侦探追踪到了小偷的藏身之处。
3. 3. We need to trace the missing child back to her parents.
   我们需要将失踪的孩子追溯到她的父母那里。