At the same time, all regions and sectors have done a large of work and carried out a series of useful exploring and attempt which have made an obvious result. But migrant workers have some problems to be solved which involve a lower wage without being paid on time; a long work time with the bad safety condition; lack of societal guarantee with more professional sick and work-relates injures. There are still other difficulties such as training, education of their children, living condition. Protecting the right of migrant workers is a prominent issue to be solved in the next period.

个人建议：尽量用专业简略的名词表达，比如拖欠工资用“payout default:"，这样比较简略而且专业，翻译考试时会给你加分。另外注意被动语态的使用，显得比较正规。而且有时候也没必要说出主语。