1. The police relied on informers to gather information about the criminal organization.
警方依赖告密者收集有关犯罪组织的信息。

2. The informers provided valuable tips that helped solve the case.
告密者提供了有价值的线索，帮助解决了案件。

3. The informers were rewarded for their cooperation with the authorities.
告密者因与当局合作而获得奖励。

4. The informers were able to infiltrate the gang and gather crucial evidence.
告密者成功渗透到帮派内部，收集到了关键证据。

5. The informers risked their lives to provide information to the authorities.
告密者冒着生命危险向当局提供信息。

6. The police promised to protect the identity of the informers to ensure their safety.
警方承诺保护告密者的身份，以确保他们的安全。