地震: [地球物理] earthquake; earthshock; earthdin; temblor; seism 短语和例子国家地震局 the state bureau of seismology; 急速地震 tachyseism; 预报地震 predict earthquake; 火山地震 volcanic earthquake; 多地震地区 a land of earth
地震周期: earthquake cycleearthquake periodicityseismic period
