the Mason-Dixon Line
noun[S]
uk/ˌmeɪ.sənˈdɪk.sən ˌlaɪn/us/ˌmeɪ.sənˈdɪk.sən ˌlaɪn/theborderbetween thestatesof Maryland and Pennsylvania in the US,traditionallyconsideredtomarkthedivisionbetween thenorthandsouthof the US
梅森-狄克森线（美国马里兰州和宾夕法尼亚州之间的分界线，也是传统上认为的美国北方各州和南方各州的分界线）Territorial boundaries
- border
- bound
- boundary
- bourne
- checkpoint
- frontier
- hard border
- no-man's-land
- passport control
- state line
- the Iron Curtain
- transboundary