由于那些地方的地震监测仪器很少，因此实际上我们无法测得所有的小地震。
The sparse seismic instrumentation in those areas doesn't allow us to actually record all the smaller earthquakes.
随着电子技术和计算机应用技术的迅猛发展，地震监测仪器的技术性能也在不断的提高。
With the rapid development of electronic and computer application technology, the technical characteristics of seismic surveillance instruments are improving increasingly.
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