And we can argue about whether or not that's work, but that has been the intention certainly in the 20th century and now 21st.

我们可以对这种现象有所争论，但这个观点,肯定是20世纪和现在21世纪的焦点。

普林斯顿公开课 - 人性课程节选

An important idea, to be sure, breast cancer a major killer, a major concern to women.

不过可以肯定这样一个重要的理念,乳腺癌是妇女的主要健康杀手和关注焦点

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选