耳闻目睹: to witness personally...
有益: useful, beneficial, profitable...
来历: history, antecedents, origin...
传递: to transmit, to pass on to sb else, (math.) transitive...
里程碑: milestone...
综上所述: to summarize, to sum up...
体现: to embody, to reflect, to incarnate...
网络: network (computing, telecommunications, transport etc)...
米: rice, meter (classifier)...
中学生: middle-school student, high school student...
