十三的单词怎么写

　　My son's thirteen but he's young for his age.

　　我儿子十三岁了，但他比实际年龄显得小。

　　Thirteen is often considered an unlucky number.

　　十三常被认为是不吉利的数字。

　　During the expedition, they trekked ten to thirteen hours a day.

　　在探险期间，他们每天都要走十到十三个小时。

　　She was baptized when she was a month old and confirmed when she was thirteen.

　　她出生一个月时受洗礼，十三岁时受坚信礼。

　　He was one of thirteen children from a poor family.

　　他是13名来自贫困家庭的孩子之一。