moral compass
noun [ C ] uk/ˌmɒr.əl ˈkʌm.pəs/ us/ˌmɔːr.əl ˈkʌm.pəs/
道德准则，道德指南针（指令人们能判别是非，清楚行为准则的自然感觉）
a natural feeling that makes people know what is right and wrong and how they should behave
Some people believe that the increase in crime shows that society is losing its moral compass. 一些人认为，犯罪率的上升反映了社会道德准则的缺失。