专业释义英英释义
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直接远程拨号长途直拨电话ddd 长途直拨直接长途拨号
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远程直接拨号
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长途直拨直接长途拨号
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直接长途拨号
·2,447,543篇论文数据，部分数据来源于NoteExpress
Direct distance dialing
- abstract: Direct distance dialing (DDD) or direct dial is a telecommunications term for a network-provided service feature in which a call originator may, without operator assistance, call any other user outside the local calling area. DDD requires more digits in the number dialed than are required for calling within the local area or area code.
以上来源于: WordNet
柯林斯英汉双解大词典
direct distance dialing
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1.
N a service by which telephone subscribers can obtain long-distance calls by dialling direct without the aid of an operator 直接长途拨号 (British equivalent subscriber trunk dialling) [美国英语]
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