1、英语13：thirteen，英 [ˌθɜːˈtiːn] 美 [ˌθɜːrˈtiːn]。
2、My sons thirteen but hes young for his age. 我儿子十三岁了，但他比实际年龄显得小。
3、Thirteen is often considered an unlucky number. 十三常被认为是不吉利的数字。
4、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。