checkpoint
noun [ C ] uk/ˈtʃek.pɔɪnt/ us/ˈtʃek.pɔɪnt/
（尤指边境的）检查站；边防关卡
a place where people are stopped and asked questions and vehicles are examined, especially at a border between two countries
Checkpoint Charlie was the most famous border crossing between East and West Berlin. 查理检查站以前是东西柏林之间最有名的过境处。