where 表示“对比”，等于 whereas。表示让步或转折，用于句首相当于though，用于第二分句相当于but。例如：

Where some people learned to play the accordion for dances in their community, others took music lessons... 

一些人学习弹手风琴，为他们社区里的舞蹈表演进行伴奏，而其他人则上音乐课。

Sometimes a teacher will be listened to, where a parent might not. 

有时教师的话会听，而父母的话可能就不听。

The big difference was that where ideas were previously published in journals or books that a reader had to buy, now the same information could be published without cost.

【翻译】最大的不同之处在于，以前作者的观点都是发表在读者必须购买的期刊或书籍上，而现在同样的信息可以免费发表了。