The original course still exists, but this is the upgraded gold version.

原来的课程仍然存在，但这是升级后的黄金版本。

You could, for example, take the Skillshare Original course on search engine optimization which is absolutely an employable skill.

例如， 您可以参加关于搜索引擎优化的 Skillshare Original 课程，这绝对是一项就业技能。

This one kilometre stretch of river was artificially straightened two centuries ago. But conservationists have now set it back on its original meandering course.

这条一公里长的河流是两个世纪前被人工改直的。但自然资源保护者们现已将它改回到了原本蜿蜒曲折的河道上。

In fact, the captain redirected the ship south of the original course but never  received the incoming messages about icebergs in that area as well.

事实上，船长将船改向原航向以南，但也从未收到有关该地区冰山的传入消息。