When the hydraulic system failure, there are many possible fault source.
当液压系统出现故障时，故障根源有许多种可能。
Another source is current difficulties, which people rarely tend to think are their fault.
另外一个源头就是当前面临的困难，通常人们很少会认为那是他们自己犯下的错。
The field and source precursors appear in old fault belts.
源兆和场兆都集中在老断层上。
The field and source precursors appear in old fault belts.
源兆和场兆都集中在老断层上。
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