according to Orthodox Jewish custom, an area of a town whose edges are marked by a wire, or the wire itself, within which certain activities are allowed on holy days that would not normally be allowed in public on those days

The eruv is a sanctioned strategy for symbolically extending private space into the public domain of streets and sidewalks. 划定开戒界域是一种受到认可的策略，它象征性地拓展了私人空间，使其从家里延伸到大街上。

Outside an eruv, actions such as carrying water or prayer books or pushing a pushchair are prohibited in public on most holy days. 在多数圣日，如果在线墙之外，犹太教信徒不准在公共场合端水、持祈祷书或是推童车。