exclave
noun [ C ] uk/ˈeks.kleɪv/ us/ˈeks.kleɪv/
飞地（被包围在另外一个国家境内，和本国其他领土不接壤）
a part of a region or country that is not connected to the main part but is surrounded by another region or country
Kaliningrad is a Russian exclave pinched between Poland and Lithuania. 加里宁格是俄罗斯的一块飞地，夹在波兰和立陶宛之间。
Compare: enclave