对我来时，老年总比我大十五岁。

To me, old age is always fifteen years older than I am.

艾米加入哥哥此次冒险旅程的时候，年仅十五岁。

She was fifteen years old when she accompanied her brother on this adventure.

乔十五岁，住在帕克维尔。

Jo is fifteen and lives in Parkville.

她十五岁后，对旅行产生了兴趣。

After she turned fifteen, she became interested in travelling.

迈克·罗宾逊是一个十五岁的美国男孩。

Mike Robinson is a fifteen-year-old American boy.

我的名字是苏西·汤普森，我十五岁。

My name is Susie Thompson, and I'm fifteen.

刘宇，一个来自山东的十五岁男孩，是一名跑步明星。

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

我十五岁时开始为学校广播主持音乐节目。

I started presenting music shows for the school radio when I was fifteen.

乐观号是一种供十五岁以下儿童使用的小型帆船。

The Optimist is a small sailing dinghy for children up to the age of fifteen.

她下个月就满十五岁了。

She will turn fifteen next month.