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Considering the fuel salt flow effect of the molten salt reactor, the neutron dynamic model was derived based on the particle conservation equations, and the critical problem was calculated by numerical method under three working conditions to study the flow effect to effective multiplication factor, fast neutron, thermal neutron and delayed neutron precursors distribution.

考虑新概念熔盐堆燃料盐的流动特性，从基本的粒子守恒方程出发，推导了熔盐堆的中子动力学模型，并采用数值方法对3种工况下熔盐堆的临界问题进行计算，考察流动对有效增殖系数、快中子分布、热中子分布及缓发中子先驱核分布的影响。

The neutron flux distributions are calculated from the 3D diffosion equations of two energy groups and six delayed neutron precursors by separaing the "time" and "space" variables.

堆芯中子通量分布采用分离变量法对两群六缓发中子组三维扩散方程来实时求解，并考虑慢化剂密度、硼浓度、氙和钐中毒、控制棒位置、燃料和慢化剂温度、燃料燃耗等因素对中子通量分布的影响。

In modern times some premillennialists have speculated on the trend of current events as possible precursors of the great tribulation, some even attempting to identify the antichrist with such candidates as Kaiser Wilhelm II and Mussolini.

在近代一些premillennialists炒作的趋势，目前的事件尽可能前兆伟大的磨难，有些人甚至试图找出箴与这些候选人作为凯撒威廉二世与墨索里尼。

Ainu origins have been investigated archeologically for many years, and we have a few materials here that represent some of the precursors to Ainu culture including Jomon materials which is one of the old cultures of Japan seen here and some Okhotsk culture materials in the next case.

考古学者对阿伊努人的起源研究了许多年，我们手头上有一些展品是处于阿伊努文化之前的，比如说古日本文明的其中之一，绳纹时期的器具，另一边还有些鄂霍次克文化的物品。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。