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警察, けいさつ
1. police
2. police officer
3. police station
4. self-appointed enforcer (of a rule, standard, etc.), busybody, vigilante, gatekeeper
警察;警官
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题;表示与另一选项(无论是否明确提及)形成对比;表示强调