2)A与B的关系的C来表示。 ② A and B are related by C ② A is related to B by C 3)在1999信息产业取得了很大的发展 The year 1999 saw great development of information industry 近年来无线电通讯服务有了非常迅速的发展。 Recent years have witnessed a very rapid growth of wireless communication services 4)请读者参考 The reader is referred to① A and B are related by C. ② A is related to B by C. 2) A 与 B 的关系由C 来表示。 The year 1999 saw great development of information industry. 3) 在1999年信息产业取得了很大的发展 Recent years have witnessed a very rapid growth of wireless communication services. 近年来无线电通讯服务有了非常迅速的发展。 The reader is referred to … 4) 请读者参考…