Expressions:
1. Serve the purpose of rehabilitating criminals 起到改造罪犯的作用
2. Locked behind the bars 关在监狱里
3. Commit minor offenses/petty crimes 犯小罪
4. Be surrounded by somebody 被…所包围
5. Felons/serious offenders 重刑犯
6. Be perfectly aware of something 充分意识到
7. Identify the true motivation behind criminals 找到罪犯背后的动机
8. Violate the laws and regulations 违反法律法规
9. Serve prison sentences 服刑
10. Tarnished records 有污点的记录
11. A deterrent force against something 威慑力
12. Be deprived of freedom 被剥夺了自由
