岁课

他7岁开始上钢琴课。

He started piano lessons at the age of 7 .

我从5岁开始上钢琴课，后来我放弃了。

I started taking piano lessons at5 , then I quit .

第一次知道性知识是什么时候？10-12岁在健康教育课上。

When was the first time you knew about sex education ? 10-12 years old in health class .

如果你想要混进常春藤大学里蹭课而不被发现，那么就从人多的大课开始&这正是今年28岁的加拿大蹭课大神纪尧姆•杜马斯的建议。

If you want to start taking classes at an Ivy League university unenrolled and undetected , says Guillaume Dumas , a 28-year-old Canadian , start with big lecture courses .

根据多年的教学实践及资料收集分析，探讨高中女生（平均年龄16岁）对体育课普遍缺乏积极性的成因。

The writers hae discovered the reasons for the lack of enthusiasm among high school girl-students , whose average age is 16 years old , on the basis of years'teaching experiences and a wide collection and analysis of the teaching materials .

他第一次访问卢浮宫是在11岁那年学校历史课组织的旅行中，但回到家里，他却没有对父母说起这件事，父母从未带他参观过博物馆。

His own first visit to the Louvre was a history class trip at the age of 11 . When he came home , he said , he told nothing to his parents , who had never taken him to a museum .