“direct distance dialing”的概念、定义、翻译、参考文献-科学参考

单词	direct distance dialing
释义	direct distance dialing [dǝ¦rekt ¦dis·tǝns `dīl·iŋ] ^{COMMUNICATIONS} A telephone exchange service that allows a telephone user to dial subscribers outside the local area using a standard routing pattern from the local or end office.
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