是我回想起我所成长的20世纪中页的耳熟能详的周期性断电，耳边回荡着“备用广播电视应急”测试的声音。
I thought back to the periodic interruption I'd grown up with in the mid-20th century — the ear-invading tone that was part of the radio and TV "emergency broadcasting system" test.
交流源不会提供足以烧断电源保险丝的电流﹐因此不适合非正常测试。
AC source may not deliver current to blow the fuse in a power supply, it is not suitable for abnormal test.
断电法测试在国内还处于推广和应用阶段，尤其是在无s CADA系统的长输管道上，其应用还处于尝试阶段。
Breakpoint testing is still in the stage of application and dissemination. It has been being on trial for long distance transmission pipeline without SCADA system.
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