The police have informers in the london underworld .
警察在伦敦的下流社会中有告密者。
It is cheap and governments do not have to deal with the risks and insecurities associated with intelligence officers , agents and informers operating in foreign countries .
这种做法成本低廉，而政府也无须应对在外国活动的情报机构官员、间谍和密探所带来的风险和不安全感。
The police are public information there entitled " criminal informers secret report " documents , which include some of the report 's name and home address .
被公开的警方资料中还有一份名为“告发犯罪秘密报告”的文件，里面包括一些报案者的姓名和家庭住址。
Foreign exchange control agencies shall keep secrets for informers and reward informers or entities and individuals that make contributions to the inspection over illegal acts regarding foreign exchange .
