This book has thirty-one chapters.

这本书有三十一章。

He is thirty-one years old this year.

他今年三十一岁。

There are thirty-one students in our class.

我们班有三十一个学生。

He took thirty-one minutes to finish this problem.

他花了三十一分钟完成这道题。

Twenty-six and Five make thirty-one.

二十六加五，三十一。

Anna: : actually, I'll be thirty-one in September.

安娜：事实上，到今年九月我就三十一岁了。 。

Marjorie:Thirty-one. She's two years older than Lois.

马乔里：三十一岁，比洛伊丝大两年。

You can look at page thirty-one in the Hughes edition.

你们可以看到休斯版本的31页。

Photo thirty-one: one reporter bought some snacks for Gong Jinghong.

图三十一：有一位记者，买了一些零食送给龚京红。

There is a teacher and thirty-one students in the classroom.

教室里有一个老师和三十一个学生。