To go online you had to connect your computer to a phone line and dial something called a BBS.

要上网，您必须将计算机连接到电话线并拨打称为 BBS 的电话。

A BBS is a bulletin board system, a way for people to call and leave messages that other people could read later, like a bulletin board.

BBS 是一种公告板系统， 是一种供人们打电话和留言供其他人稍后阅读的方式，就像公告板一样。