英语翻译Public switched telephone network(PSTN) is perhaps the most stupendous telecommunication network in existence today.There are over 400 million telephone connections and over 60,000 telephone exchanges in the world over.The length of telep

英语翻译Public switched telephone network(PSTN) is perhaps the most stupendous telecommunication network in existence today.There are over 400 million telephone connections and over 60,000 telephone exchanges in the world over.The length of telep 英语翻译public concertschool orchestra 英语翻译The thickness measuring equipment inside the cabinet can be switched on constantly because it will be switched off with the main switch of the cabinet. 英语翻译翻译 a public course 英语翻译public limitations on land 英语翻译公益广告应该是：public service advertising 或者 public interest 英语翻译公安部是public security ministry?公安厅是public security department?公安局是public security bureau? public public public circuit switched network是什么意思 circuit switched network是什么意思 switched ip network switched circuit是什么意思 switched to 意思 英语翻译public holiday翻译成中文是什么意思 英语翻译the professional accountant in public practice 英语翻译a planned public activity什么意思?