代字号

• Parameters are not rooted ; that is , they do not equal the root operator the tilde , do not start with a tilde , such as a tilde and a slash mark or a tilde and a double backslash , or do not start with a slash mark , an
  不含有根路径（即，该路径不等于根操作符（代字号[ ~ ] ） ；不以代字号( ~ )开头，如一个代字号后跟一个正斜杠( ~ / )或一个代字号后跟双反斜杠( ~ ) ；或者不是以正斜杠( / )开头） ，则会引发