There are all kinds of different definitions and companies like to do it their own way because they want to present themselves in the best way to the public.

有各式各样的框架,公司可以任意选择,因为公司都希望,对外表现自己最好的一面

耶鲁公开课 - 金融市场课程节选

I had to ask them questions like, "What's the best present you've ever got?

我得问他们像这样的问题，“你收到过的最好的礼物是什么？”

在超市遇到的人 - SpeakingMax英语口语达人

So for each student the tutor builds a model of that Student's current state what the computer thinks they Know and doesn't know, and tries to present the student options that best meet what the tutor thinks are the student's need at that moment.

因此辅导系统会给每个学生,创建一个模型记录他们当前的学习状态,判断他们已经掌握和还不了解的知识,然后给出此时导师认为,最符合他们需要的选择。

麻省理工公开课 - 媒体、教育、市场课程节选