The more private the space is the level of the access ranks lower communication harder and transferability weaker.
私密性强的空间，通路的等级低，交通性弱，通达性也小。
youdao
Private access is the least permissive access level.
私用存取是最严格的存取层级。
应用推荐
模块上移
模块下移
不移动