常见例句用作名詞 (n.)This facility is important in some PBX systems which use nonstandard lines that certain modems will interpret as a dead line.這種設備在某些專用小交換機系統中非常重要，這些系統用的是非標準線路，某些調制解調器會把它們儅作死線路。 返回 PBX