鸟栖息在电话线上。

The birds perched on the telephone wires.

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结论：在电话线上实现的远程会诊技术是优于传统书面会诊方式的一种新的会诊形式，简便、可靠、高效。

Conclusions: Telemedicine consultation has been realized on telephone lines and proved applicable, the new form of consultation is better than the traditional form of written consultation.

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ISDN工作在标准的“合格”电话线上，这意味着电话公司须检查以确保线路没有开裂或损坏。

ISDN works over a standard "qualified" telephone line, which means telephone companies check to make sure the line has not been split or damaged.

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