"Everything from basic language skills of agreement of subject and verb, use of commas and other punctuation, complete and incomplete sentences, so that we can move from basic writing/language skills to the more sophisticated skills that graduate students, upper level undergraduates and people in the work world use."

VOA: special.2010.02.11

You don't see strings with commas between them, but it has the same kind of property. It is in ordered sequence of characters.

它是有序的字符序列,我们可以对字符串做同样的操作,我们也可以得到字符串中的一块。

麻省理工公开课 - 计算机科学及编程导论课程节选

But sometimes you can pass multiple things inside those parentheses, and so you separate them by commas.

有时候我们可以往圆括号里填入多个参数,参数与参数之间用逗号分开。

哈佛公开课 - 计算机科学课程节选

OK. And how do I create them? Well, the representation is, following a square bracket, followed by a sequence of elements, separated by commas, followed by a closed square bracket.

就是一个有序的序列，好，那么我们怎么创建元组呢？,好，表达式是，一个方括号，后面是一系列的元素，以逗号分开,以一个闭方括号结束，这就是我刚才所说的。

麻省理工公开课 - 计算机科学及编程导论课程节选

So I'm going to put the left and right in inverted commas here because actually what they did was they corrected for people's natural direction and not natural direction.

现在我用反转的方式表示左右,因为,实际上,他们为此做了有关,人自然方向与非自然方向的研究

耶鲁公开课 - 博弈论课程节选

int A Well, one, function has called swap, takes one int called A, printf followed by another int called B, and as we've seen with print F, if you have multiple arguments, you separate them by commas.

好的，函数叫做swap，一个参数是，另一个参数是int，B，我们看到的,如果你有好几个参数，把它们用逗号分开。

哈佛公开课 - 计算机科学课程节选