You have to jump through hoops just to ask the user for a piece of input which should be really the thing a language prioritizes.

你要百依百顺才能从用户那里得到一个输入,这个输入可能只是一个,语言优先级。

哈佛公开课 - 计算机科学课程节选

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