There is a fault in the electrical system.
电路系统出了故障.
The fault escaped observation (ie was not spotted) for months.
这故障数月来未引起注意.
A sudden movement of the earth's crust caused by the release of stress accumulated along geologic faults or by volcanic activity.
地震由于地质断层积聚的压力被释放或由于火山活动引起的地壳的突然变动
