252. A graduated license requires that a teenager first prove himself capable of driving in the presence of an adult, followed by a period of driving with night or passenger restrictions, before graduating to full driving privileges.

毕业证需要青少年首先证明自己可以在一位成年人在场的情况下驾驶，并在完全获得驾驶特权之前，经历一段时间的夜间或乘客限制驾驶。

本句的主干是license requires that。that引导的是requires的宾语从句，in the presence of an adult为状语，followed by a period of driving with night or passenger restrictions和before graduating to full driving privileges皆为时间状语。

capable of doing sth.的意思是“有能力做某事”，也可直接用做capable of sth.。如：

She is capable of better work than this. 她有能力把工作做得更好。

in the presence of sb.的意思是“在……面前，有……在场”，也可用作in sb.'s presence。如：

You never seem at ease in my presence. 你在我面前总是显得不自在。

graduate to的意思是“逐步发展到，升级到”。如：

She finally graduated to having a role in a movie. 她终于能在电影里扮演角色了。