keep in touch with用什么解释share imformation send email

keep in touch with
stay in contact with
drop sb.a line
都有近似意思,即 “保持联系”.
和 share information 意思不同,也未必是 by email （可以通过 电话,信件,等等）.People keep in touch witn others on the Internet.呢？人们通过互联网互相联系 （比如电邮，博客，论坛等等。）