2018-03-25から1日間の記事一覧
本日は call waiting の用法です。・Call waiting is a telecommunication service offered by a telephony service provider to a subscriber by which the subscriber may suspend a telephone call already in progress to accept a second call. (キャッ…
本日は call waiting の用法です。・Call waiting is a telecommunication service offered by a telephony service provider to a subscriber by which the subscriber may suspend a telephone call already in progress to accept a second call. (キャッ…