n. 边界；边缘地区（border的复数）

n a line that indicates a boundary

n the boundary line or the area immediately inside the boundary

n the boundary of a surface

n a decorative recessed or relieved surface on an edge

n a strip forming the outer edge of something

v extend on all sides of simultaneously; encircle

v form the boundary of; be contiguous to

v enclose in or as if in a frame

v provide with a border or edge

v lie adjacent to another or share a boundary