Since optical paths are reversible, the opposite arrangement is also true.因为光路是可逆的, 所以也可以反过来安装.Her class teacher made a special arrangement to discuss her progress at school once a month.她班上的老师作了特别安排，每月讨论一次她在学业上的进展情况。Cop...
Six of Brazil's 27 states have semi - privatized jails.巴西27个州中有6个拥有半私立监狱.Jails and temporary detention camps are overflowing.监狱和临时拘留所里人满为患。...jails and other parts of the correction system.监狱和其他惩治改造机构She was so igno...