那条小路就是我们这片地的界线。 The lane is the boundary of our land.
就像那个说他除了昆虫和民间舞蹈啥都想试试的人一样，我们大多数人心里都有个人界线，知道该在哪儿收手。 Most of us would draw the line somewhere, like the man who said he'd try anything once except insect and folk dancing.
礁石外深色水域分界线 A line of darker water beyond the reef.
沟渠，排水沟，水道在地面上狭长的沟渠或细沟，用于灌溉、排水或用作分界线 A long narrow trench or furrow dug in the ground, as for irrigation, drainage, or a boundary line.
周围一个图形、区域或物体的边界线 The boundary line of a figure, area, or object.