... continental active area 构造活动区域 low active area 低活性区 public active recreation area 公众运动场地 ...
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Thus research has been going on for some time in the area of low frequency active (LFA) towed array sonar.
如此研究一直在低频率活跃的 （LFA） 被拖的排列声纳的区域中继续有一些时间之久。
The geothermal anomaly, low velocity zone and high conductivity layer in crust, and frequent occurrence of strong earthquakes show that the study area is an active area of modern tectonization.
地热异常、地壳内存在低速层和高导层、强烈地震频繁发生等现象说明，这一地区是现代构造运动的活动区。
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