region: n.1.地方，地域，地带；地区；行政区，管辖区，区；左近，邻近；(大气、海水等的)层，界，境。2.【解剖学；动物学】(身体的)局部，部位。3.(学问等的)范围，领域。4.〔罕用语〕天空。短语和例子a fertile region 肥沃地带。 a desert region 沙漠地带。 forest regions 森林地带。 the lower [infernal, net
Based on some macroscopic evidences gained in actual earthquake fields and on a preliminary theoretical analysis , it has been pointed out that the rayleigh waves should be an essential cause of liquefaction for the fields beyond the epicentral region with saturated sand deposits at shallow depths ( 4 )首先介绍了提出rayleigh波是液化主因的背景，基于宏观震害资料的启示，提出了rayleigh波可能是造成砂土液化的主要动因的新见解。并用单相介质模型的总应力法，分析了rayleigh波可能产生的应力大小。
