Most fonts are equipped with at least two dashes: an en dash (-, -, which is the width of a lowercase "n") and an em dash (-, -, which is the width of a lowercase "m").

大多数字体都拥有二种不同的横线破折号：en横线(—，—，相当于小写的“n”的宽度)以及一个em横线(—，—，宽度相当于小写的“m”)。

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But it grows pretty rapidly, as n goes up, and I'm going to show you an example in a second.

解决问题需要的时间会急剧增长，一会儿我会让大家看个例子的,我想大家注意的还是。

麻省理工公开课 - 计算机科学及编程导论课程节选

So let's just think exactly what this means, and that means that if we take away function and we define it in terms of n, l and m sub l, what we're defining here is the complete description of an orbital.

让我们来考虑一下这是什么意思，这是说如果我们不考虑波函数,而是用ｎ，ｌ，ｍ下标ｌ来定义它，我们定义的,是一个轨道的完整描述。

麻省理工公开课 - 化学原理课程节选

If they type in bogus characters, it's going to yell at them and make them retry, and eventually I'm going to get handed back an int, which I'm storing in n. Well, if I actually want to judge this number based on its magnitude, well, I can say now, "If n is greater than or equal to one."

如果他们键入了不合法的字符，它将对他们叫喊,然后叫他们重试，最终我将,得到一个int数，它是存储在n中的，好的，如果我的确想要根据它的量级来判定这个数字，好的，现在我可以指明，“是否n大于等于1“

哈佛公开课 - 计算机科学课程节选