compulsory fee强制性规费compulsoryadj.强制的；势在必行的；义务的compulsory certification products强制性认证产品Compulsory Private Provident Fund强制性私营公积金compulsory premarital check-ups强制婚检compulsory criminal investigation强制性侦查compulsory-atlendance age limit义务教育年限compulsory educational expenditure义务教育经费compulsory education in rural area农村义务教育compulsory administrative measures行政强制措施compulsory course'Field and Track'n.总烟囱compulsory education of rural areas农村义务教育

1. He says most forced labor is in the private economy, and it is usually for several months or years.
   他说绝大部分的强制劳动存在于私营经济中，而且通常会持续数月或者数年。