The foursome originally teamed up to create SparkNotes, an online academic study tool, before launching OkCupid in 2004.

2004年推出OkCupid之前，这四人先是携手开发了一个网络学术研究工具SparkNotes。

youdao

I recommend: you'll need to study up on a subject yourself before you can teach it; SparkNotes offers free online study guides on a variety of topics within a number of subjects.

我建议：在教学之前，你需要重新对这个科目的相关内容再学习一下。SparkNotes提供各种各样的在线免费学习课程。

youdao

I recommend: you'll need to study up on a subject yourself before you can teach it; SparkNotes offers free online study guides on a variety of topics within a number of subjects.

我建议：在教学之前，你需要重新对这个科目的相关内容再学习一下。SparkNotes提供各种各样的在线免费学习课程。

youdao