鸽巢原理

[计]归档原理，分类原理，信箱原理，格孔原理

general principle───一般原则；一般原理；普遍原理

pleasure principle───快乐原则；避苦趋乐的本能

Carnot principle───卡诺原理

Huygens principle───n.[光]惠更斯原理

governing principle───指导原则

in principle───大体上，原则上

moral principle───道德原则

The pigeonhole principle (more generalized)───鸽子洞原理（更为广义）

By the pigeonhole principle, at least two must be of the same color.───由鸽子洞原理，至少有2只有相同的颜色。

Amazingly, this is also about the pigeonhole principle!───令人惊奇的是，这同样是鸽子洞原理的运用！

Thus, the pigeonhole principle implies at least two wordpress. com blogs must have the same number of yearly comments.───据此，由鸽子洞原理表明，至少有2个WordPress.com博客每年的评论数相同。

By the pigeonhole principle, two of those turkeys must have the same weight to the nearest millionth.───根据鸽子洞原理，其中的2只火鸡体重最接近于精确到百万分之一磅的数值。

By the pigeonhole principle, two of the numbers must be the same.───据鸽子洞原理，有2个数字必然相同。

The pigeonhole principle is a powerful tool used in combinatorial math.───鸽子洞原理是分析数学组合的有力工具。

There is another version of the pigeonhole principle that comes in handy.───另外一种版本的鸽子洞原理迟早也能碰到。

The pigeonhole principle is a important principle in combinatorics.

You can say that the proof uses nothing beyond elementary matrix theory, repeated use of the triangle inequality, and the pigeonhole principle.