A one-million-year-old skull主语; bearing traits定语,修饰skull,携带着特征 ;associated both with Homo erectus and Homo sapiens 定语,修饰traits,特征是有关H
真正的谓语动词是has been found
indicating伴随状语
没看到and。。。花了好长时间想最后的谓语动词哪里来的。。。
the number of students in public schools( has grown steadily since the mid-1980's) and, (at nearly 47 million, has reached a record high)
BDE其实都是说environmental regulations promote growth。排除