safe haven
noun [ C usually singular ] uk/ˌseɪf ˈheɪ.vən/ us/ˌseɪf ˈheɪ.vən/
安全场所，避难所
a place where you are protected from harm or danger
As long as the UN soldiers were present, the city was regarded as a safe haven for the refugees. 只要联合国士兵驻扎在此，这座城市就是难民们的避难所。