左岩（1996）认为，沉默占总会话时间的比例从5%到65%不等，一般在其长度的40%&50%。
Zuo Yan ( 1996 ) points out that , in terms of its length ( time ) in a conversation , silence ranges from 5 % to 65 % , averaging about 40-50 % of a conversation .
左岩