If you're writing a one line function, whose sole purpose in life is addition, and, clearly, this is about addition, well, then it's, in fact, A reasonable to use a shorter symbol like A, but I do have to specify it's type.

如果你在写一个一行的函数，它唯一的目的是,做加法，显然这是关于加法的，好的，实际上，用一个短的标识符是合理的，像，但是我必须指明它的类型。

哈佛公开课 - 计算机科学课程节选

At its extreme what I'm think of an undergraduate Education is a four-year initiation into a life-long Club. Right now students tend to think I come to University and I leave the university. And for many Of them their sole contact is when they get a limonite newsletters and solicitations for donations.

它的极端就是把4年的本科教育,发展为终生教育,现在学生总觉得,来读大学又会马上离开,真正的接触也许只有在,收到校友新闻信和捐款征询时,才感觉到。

麻省理工公开课 - 媒体、教育、市场课程节选

It's defined in CS50's library; its sole purpose in life is to ask the user for a floating point value and return it.

它被定义在CS50的函数库中，它的唯一目的是,向用户询问一个浮点数的值，然后返回它。

哈佛公开课 - 计算机科学课程节选