Liu Yu, a fifteen-year-old boy from Shandong, is a running star.

刘宇，一个来自山东的15岁男孩，是一个跑步明星。

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When you're a fifteen-year-old boy, you blank out a lot of things. You just focus on what you're doing.

十五岁的男孩总是会忽视很多事情，只顾着做手头上的事。

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Police in American have stepped up their search for a fifteen-year-old boy who went missing three day ago in Dover, New Hampshire.

美国警方现已加快对一名五岁男孩的搜寻，该男孩于两天前在新罕布什尔州的多佛市失踪。

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Edward Norton, replacing Eric Bana, is Bruce Banner, who, when provoked, grows into fifteen feet or so of lime-green power with the temperament of a nasty five-year-old boy he likes to throw things.

NEWYORKER: The Incredible Hulk