thirteen

A typical baker's dozen contains thirteen items.

(Chinese) 典型的一打面包师数量是十三个。

There were thirteen original colonies that formed the United States.

(Chinese) 有十三个最初的殖民地组成了美国。

My sister is thirteen and just started eighth grade.

(Chinese) 我妹妹十三岁，刚上八年级。

In many cultures, a thirteen-year-old celebrates becoming a teenager.

(Chinese) 在许多文化中，十三岁的人会庆祝自己成为青少年。