小震震源深度的分布情况表明，两次历史大震的震源断层可能都比较浅。
The distribution of focal depths of small earthquakes shows that focal faults of the two historical strong earthquakes should be shallow.
小震震源深度的分布情况表明，两次历史大震的震源断层可能都比较浅。
The distribution of focal depths of small earthquakes shows that focal faults of the two historical strong earthquakes should be shallow.
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