The activity trend of shallow and deep earthquakes in Northeastern China before 2005 has been estimated in this paper according to seismic natural cyclicity and astronomical period incident etc.
从地震活动时间序列的自然节律和地震天文周期等方面，对2005年以前东北地区浅震和深震的趋势，作了分析和预测。
The analysis that the size of the focal shift is related to the factors such as Fresnel number, separating degree of lens-diaphragm and curvature radius of incident wave wavefront, etc.
分析表明，焦移的大小与菲涅尔数、透镜-光阑的分离程度以及入射波波面曲率半径等因素有关，并得出了消除焦移的条件。
The English understand by marine risks?only risks incident to transport by sea, such as pene, pen e tra tion of sea water into the holds of the ships, etc.
榴—— 英国人对“海洋运输货物险”只理解为海运中的意外风险，诸如船舶碰撞、搁浅、起火、海水侵入船舱等。
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