ext. star2

• 1.  

  N-VAR（有变体名词） Ext. is the written abbreviation for when it is used to refer to a particular telephone number. 分机号 [N num]

  例：

  For a full festival programme call 206-555-7115, ext. 239.

  需要详尽的节日活动安排，请拨打电话206-555-7115，分机号239。