This is saying, that's a class, true or sorry, an instance of a class, and I'm going to get the x value associated with it.

那么两个点是同一个点，我会返回，注意格式，这儿的意思是,它是一个类，噢对不起。

麻省理工公开课 - 计算机科学及编程导论课程节选

it's not as good as helping debug, sorry, that's the wrong way of saying it's not as good at catching some things before you run them, it is easier at some times in debugging as you go along on the fly.

它在帮助我们调试方面可能不是太优秀，对不起，这么说有点不正确,它在运行前捕捉错误,可能不是那么优秀，可能边运行边调试,会更容易一些。

麻省理工公开课 - 计算机科学及编程导论课程节选