A wordis valid if and only if each ordered pair of adjacent letters inthe word is a valid pair.

牛语的单词是由字母组成的序列，一个单词是有意义的充要条件是任意相邻的字母都是合法的词素。

When Tyler Galganski ordered himself a pair of one-piece pajamas in early 2009, he was disappointed with the quality.

2009年年初，Tyler Galganski为自己订购了两条一体睡衣裤，但他对产品的质量颇感失望。

Since then, she has ordered another pair of shoes and a pair of boots.

从那时起，她又定做了一双鞋与一双靴子。

My father ordered a pair of shoes for me.

爸爸为我订购了一双鞋。

Crowe doss once again fly into a rage, he ordered the soldiers stormed into the temple, dragged from a pair of being held wedding couple side will be Valentine, into a dungeon.

克劳·多斯又一次暴跳如雷，他命令士兵们冲进神庙，将瓦沦丁从一对正在举行婚礼的新人身旁拖走，投入地牢。

Once, when his father was still alive, a young lady ordered a pair of red shoes.

一次。在父亲还活着的时候。一个年轻的女士订做了一双红鞋子。

Tired of having to look up to other people, he ordered the royal cobbler to make him a pair of shoes with extra-high heels, and soon, both men and women were wearing them.

它讨厌总得抬头看别人，于是命令御用鞋匠给他坐了一双鞋跟加高的鞋。很快，越来越多的男人和女人页开始穿这种高跟鞋。

The logical formulas are an ordered binary pair, the first element is an assertion and the second is a definable domain or approximations of undefinable domain corresponding to the assertion.

这种逻辑公式的结构是有序二元对，第一元是断言；第二元是对应于这个断言的可定义集或不可定义域集的近似集。

"Laughing playfully he said," So, I ordered a pair custom made just for me.

“他打趣地笑着说：”我于是也给自己订做了一双。