在由非水平裂隙构成的界面上，P-P波反射系数会出现更多的极值而变得较为复杂，且不能直接指示裂隙走向。
On the interface where there are non-horizontal fractures, reflection coefficient of P-P wave has more extrema to show complexity and to fail to directly indicate fracture strike.
从外形设计、吸波材料、对消、干扰和微波传播指示技术五个方面对雷达隐身技术的实现方法进行了综述。
This paper reviewed the realization methods of radar camouflage from five aspects, shaping design, absorbing materials, jamming, offset and microwave propagation indicating technique.
火山区存在的震群活动、部分台站观测到的S波阴影区以及地表的缓慢抬升等，指示火山区存在一个岩浆系统。
The existing of earthquake swarm, S wave shadow in some seismic stations and gradually uplifting of surface suggest a magma system beneath these volcanoes.
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