enroll中等

There is one step the TSA could take that would not require remodeling airports or rushing to hire: Enroll more people in the PreCheck program.

运输安全管理局可以采取一项既不需要改建机场、也不需要仓促招人的措施：让更多的人加入“预检”项目。

The TSA wants to enroll 25 million people in PreCheck.

运输安全管理局希望让2500万人加入“预检”项目。

But when Swetnam enrolled in graduate school at the University of Arizona’s Laboratory of Tree-Ring Research, he was surprised to find a record of repeated blazes dating back hundreds of years before European colonists arrived on the continent.

但当斯韦特纳姆进入亚利桑那大学树木年轮研究实验室读研究生时，他惊讶地发现了一份反复发生火灾的记录，这些记录可以追溯到欧洲殖民者抵达这片大陆之前的数百年。

And third, growth was reflected in changes in the proportion of the relevant age group enrolled in institutions of higher education.

第三，增长体现在相应年龄组中进入高等院校就读者所占比例的变化上。

Mr. Roth has three community-college students enrolled in a work-placement program, with a starting wage of $13 an hour that rises to $17 after two years.

罗斯先生招收了三名社区大学的学生参加一个实习项目，起薪为每小时13美元，两年后涨到17美元。