推导出由特征多项式的系数表示的线图（无重边图）中圈的个数，双向结点对个数，单向结点对个数及简单图中有向三角形个数的计算公式，等等。

The formulae for the number of loops, edges, triangles, pairs of two-way nodes and pairs of one-way nodes are deduced by the coefficients of a characteristic polynomial, so on.

youdao

不仅因为他们通常一起从市场购物，而且因为他们的座位通常会倾向重的一边。

Not only because they generally have shopping with them for the market, but because they are often on the heavy side.

youdao

我过去以为，它如果建造得再重些，再宽些的话，附近的那些楼房就得移到一边去，给它腾出地方的。

I used to think that if it made itself any heavier and wider, the neighboring buildings would have to move aside and make room for it.

youdao

So this is a little scale that if you put something here or here it's supposed to tell you which one is heavier and I also have 8 cups here.

这是一个小天平，如果你在这边,或者这边放一些东西，它就会显示哪边的更重,我这有8个杯子。

哈佛公开课 - 计算机科学课程节选