用英语解释下列句子。
1. My friend Ken works as a detective.
2. Li bought a vase for 200,000 dollars .
3. I hope to protect the innocent as well as find the guilty.
4. Li enjoys collecting things.
5. The detective showed Jill the earring.
6. She recognized it at once.
7. Jill was no longer a suspect.
8. They didn't admit stealing the vase.
9. He went to school on foot instead of by bus yesterday.
10. Is Li behind bars now?