For this reason , the police chief regularly changes policemen 's assignments so that they can escape from the tension and danger of patrols in the ghetto .
正因如此，警察局长定期调整警察的任务，让他们远离巡逻贫民区的压力和危险。
Wilson 's history is more recent , and his optimism is apparent : three generations of black ghetto dwellers have been relying on welfare and sporadic work and doing so in isolation from the mainstream .
