百度贴吧 = Baidu’s online user forum, tieba.baidu.com

应该是 baidu post

Baidu bulletin board,Baidu Post Bar,Baidu to stick 应该都可以吧 forum也有论坛的意思 它的英语解释是a place where people can exchange opinions and ideas on a particular issue;a meeting organized for this purpose 它强调的是针对一个具体问题所举行的论坛会议