可以组成单词thirteen,意思是:十三。
例句:1.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。
2、Thirteen is often considered an unlucky number.  
十三常被认为是不吉利的数字。
3、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。
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