(noun.) an anatomical structure used as a point of origin in locating other anatomical structures (as in surgery) or as point from which measurements can be taken.
(noun.) a mark showing the boundary of a piece of land.
(noun.) an event marking a unique or important historical change of course or one on which important developments depend; 'the agreement was a watershed in the history of both nations'.
(noun.) the position of a prominent or well-known object in a particular landscape; 'the church steeple provided a convenient landmark'.
编辑:卢克
录入:勒达