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...
A bad home environment can affect a child's healthy growth.不良的家庭环境能影响儿童的健康成长。How did these factors affect development of college curricula?这些因素是怎样影响着学院的课程设置的 呢 ?Price changes must not adversely affect the living sta...