The study was, eleven- and 12-year-old boys at a camping program.

实验中有一些11，12岁的男孩,参加一个野营活动。

耶鲁公开课 - 心理学导论课程节选

She's 16. She's auditioned for a national choir that's going to perform during the Olympics.

她16岁了。她来参加国家合唱团的试音，这个合唱团将会在奥运会期间表演。

成功加入合唱团 - SpeakingMax英语口语达人

Each of you, who is above 18 and is an American citizen, and was born in America above whatever it is, whatever the rule is, whatever the Constitution says), each of you can potentially stand up now and say you're going to run for president.

你们中每一个到了18岁的美国公民,并生在美国,大于不论几岁,不论规定是多少,不论宪法怎么规定,你们都可以站出来,参加总统竞选

耶鲁公开课 - 博弈论课程节选

And then you'd sit your A Levels as well when you are 18.

在18岁的时候，也会参加 A Levels的考试。

英国的教育 - SpeakingMax英语口语达人