moral compass
noun/ˌmɒrəl ˈkʌmpəs/
/ˌmɔːrəl ˈkʌmpəs/
- the ability to judge what is right and wrong and to behave in an appropriate way
道德指南针：判断对与错并以适当方式行事的能力 - He is not the only politician who has lost his moral compass.
他不是唯一一个失去道德原则的政治人物。
- He is not the only politician who has lost his moral compass.