这些公司从更大型的电话通讯公司那里大量购买长途电话服务，但是同样的通话质量，他们的收费要低得多，他们以分钟收费或收取一些小额费用。
These companies buy their long-distance service wholesale from the larger telecommunications firms but offer the same general quality for far lower prices, billing by the minute or fraction thereof.
“猎户座”是美国一种最新的特工卫星系列，被用来截获世界许多本地及长途电话所采用的点到点无线信号——微波通讯。
"Orion" is the latest in a series of the agents satellite, used to intercept the world many local and long distance call the point-to-point wireless signals-microwave communication.
今天，世界上大约有一半的长途电话，电报及电视通讯都是由卫星转播的。
Today about half the world's long-distance telephone, telegraph, and television traffic is relayed by satellite.
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