These invisible, vague things can never form the basis of a serious science.

这些不可见，定义模糊的东西,不能被划入严谨的科学范畴里。

耶鲁公开课 - 心理学导论课程节选

It's based on the ancient form of Japanese poetry, which is something that I had never tried myself.

这些诗是根据日本古代诗歌形式创作的，我自己都从没试过。

麻省理工公开课 - 媒体、教育、市场课程节选