Many Chinese restaurants are telling people to order dishes by using the "N-1" formula."N" stands for the number of people in your group.

许多中餐馆告诉人们用“N-1”公式点菜。“N”代表你们的人数。

youdao

The formula for determining the number of communication channels is the combinatorial formula for the number of pairs you can select from n items, without regard to order. The formula 4 is as follows

决定沟通连接数量的公式就是你从数量n中挑选出配对数量的公式，不必考虑顺序。

youdao

And that is why I said that we will have an easy formula for n dS while n and dS taken separately are more complicated.because you would have to actually take the length of a direction of this guy.

这就是为什么ndS一起算时,会有一个简单的公式,而当分别计算n和dS时候，会更复杂的,因为必须取这玩意在某个方向上的长度。

youdao

And we can calculate that with the formula that we used, which was just n minus l minus 1 equals the number of nodes.

这个我们可以用我们以前用过的那个公式来计算，也就是节点数等于ｎ减去ｌ减去１

麻省理工公开课 - 化学原理课程节选

Both breast-fed and formula-fed babies who had been given n-3 fatty acid enriched egg yolks had 30-40% greater red cell membrane DHA levels than those fed normal egg yolks.

BBC: Egg boost for babies