+with The joke would not be understood by readers unfamiliar with Jewish tradition. 不熟悉犹太人传统的读者可能无法理解这个笑话。
feelings of nervousness at being in unfamiliar surroundings 在陌生环境中产生的紧张感
+to The rules of the game are quite unfamiliar to most people. 这项比赛的规则对大多数人来说相当陌生。