如何使用 "problem" 造句

1. Security is a problem too .
安全也是一大问题。
2. Credit is also a problem .
信贷也是一个问题。
3. But the long-term problem remains .
但长期问题依旧存在。
4. Corruption also is a problem .
腐败也是一个问题。
5. But the fundamental problem persists .
然而根本问题尚未解决。