求翻译：而以北京市为例，根据有关学者的统计和推算，北京在现有120万中小学生，而父母在北京工作的适龄留守儿童就有90万，而且这90万儿童的父母并不仅仅是我们一直所说的弱势群体打工人群，还包括相当一大部分在城市定居、有稳定工作和收入，为城市贡献大量税收的都市白领。。是什么意思？

Beijing, for example, according to scholars statistics and projections, 120 million primary and secondary school students, there are 900,000 school-age children left behind parents in Beijing, and 90 million children, parents, and not just our vulnerable groups has been said to work the crowd, inclu

For example, in Beijing, according to the scholars of the statistics and projections, Beijing in the existing 1.2 million primary and middle school students, and parents work in Beijing left-behind children of school age, there are 900,000 and 900,000 children of the parents and not just what we hav

But north of the capital city is an example, according to the concerned scholar's statistics and the calculation, Beijing is having 1,200,000 elementary and middle school students, but the parents work of age in Beijing remain behind to take care of things the child to have 900,000, moreover this 90

And to Beijing for cases, according to related scholars of statistics and projections, Beijing in existing 1.2 million primary and middle school students, and parents in Beijing work of age left children on has 900,000, and this 900,000 children of parents does not just is we has been by said of vul

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