从小在双语环境下长大的孩子必须关注社交线索，以弄明白在什么环境下与什么人交流该使用哪种语言。

Young children being raised bilingual have to follow social cues to figure out which language to use with which person and in what setting.

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必须关注特定的营养素。

Care must be taken with certain nutrients.

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你必须关注重用和装配组件，远离自定义组件。

You have to focus on reusing and assembling components and stay away from custom components.

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You know, yes, yes, you know, we care about you, but you have to subsume your interest, your personal interest.

是的，是的，你懂的，我们关注你，但你必须让个人利益服从集体利益。

普林斯顿公开课 - 人性课程节选

Initially a psychoanalyst, trained through the works of Freud, she realized the focuses had been too much on the negative-- on neurosis, on psychosis and said we also, not only but also have to focus on what is working on human organism.

她最初是精神分析学者，学习弗洛伊德的理论，意识到其过于注重消极面-,神经症，精神病，她认为，还必须关注影响人类生命体的东西。

哈佛公开课 - 幸福课课程节选