And the third is the reporter's story as she becomes close to the Lacks children and helps them learn more about their mother's influence on medical science.

VOA: special.2010.07.21

Again, content has to be conveyed, practice and application of what has been learnt is very important and third it's an opportunity to learn together and to learn from your peers.

同样，传达教育的内容，实践和运用所学的知识,是非常重要的,另外，这也为共同学习,和相互学习创造了机会。

麻省理工公开课 - 媒体、教育、市场课程节选

And another third because they wanted to learn about optimism.

还有三分之一是因为他们想学会乐观。

哈佛公开课 - 幸福课课程节选