与多数其它发达国家不同，美国没有一个全国性学术标准，规定要想从高中毕业，所有学生必须学会些什么。

Unlike most other developed countries, the US does not have national academic standards outlining what each student must learn to graduate from high school.

youdao

创办于1986年的交通运输系统工程专业委员会是中国系统工程学会下设的一个全国性的综合交通学术团体。

Transportation System Engineering Committee, established in 1986, is a national academic organization affiliated to Systems Engineering Society of China.

youdao

我还得和几个学生一起工作，作为参与一次全国性竞赛的一部分，把一辆耗费汽油特多的运动型多用途汽车改装成混合型电动车——就这样我学会了修车。

I also had to work with a team of students as part of a national competition to a into a hybrid electric vehicle - that's where I learned how to fix cars.

youdao