At the same time, they cannot enroll their children in city schools or benefit from many other public services until they have been officially acknowledged as permanent urban residents.
同时，他们不能把自己的孩子送到城市中去读书，或者享受城里其他的公共服务，直到他们身份转为永久城市居民为止。
Migrants are not entitled to any of the social services that urban residents get unless they convert their temporary visa to permanent residency, something that is exceedingly hard to do.
进城务工农民和城市居民享受到的所有社会服务无缘，除非他们能将他们的临时户口转成永久城镇户口。这个很难。
Methods an investigation in Beijing urban districts was conducted in a cross-sectional survey. A total of 15 000 permanent residents aged 15-69 years as a sample was randomly interviewed.
方法采用现况研究方法，对北京城区15 0 0 0名15 ~ 6 9岁的常住居民进行入户调查，了解其慢性病患病情况及行为危险因素等。
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