在此之前，气候的变化导致了海平面的剧烈波动，恐龙因此灭绝。
Changes in climate before that period caused severe fluctuation in sea level, resulting in the extinction of the dinosaurs.
白垩纪以前的气候变化导致了海平面的剧烈波动，引发了恐龙的灭绝。
Changes in climate before the Cretaceous period caused severe fluctuation in sea level, resulting in the extinction of the dinosaurs.
因为它处于一个非常炎热和干燥的地区，死海由于蒸发损失掉大量的水，导致其水平面一年到头不断波动。
Because it is located in a very hot and dry region, the Dead Sea loses much water through evaporation, causing its level to fluctuate during the year.
三个因素看来是决定了这个团队发现的是葡萄酒中的一个大的波动还是一些较小的波纹：倒入的葡萄酒的水平面与葡萄酒杯直径的比率；
Three factors seemed to determine whether the team spotted one big wave in the wine or several smaller ripples: the ratio of the level of wine poured in to the diameter of the glass;
此外，海平面在数十米区间内的波动，表明在二氧化碳接近这个临界值时东南极洲冰盖会产生剧烈蒸发。
Furthermore, sea level fluctuated tens of meters during this interval, suggesting a highly volatile East Antarctic Ice Sheet when CO2 concentrations were near this threshold value.
针对平面应变弹性波动问题，研究了自由-固定边界无限大弹性板中P -SV波的传播特性。
Wave propagation properties for P-SV wave in a free-fixed infinite plate in the state of plane strain problem were investigated.
偏光化：光是以波动形式前进，并沿着前进路线向四方八面振动。偏光化的效果是把光波的振动限制于单一个平面上。
Polarization: All light travels in the form of waves, and these waves vibrate in all directions along its path. Polarions of the waves to one plane only.
严格求解了折射率分布可用费米函数描述的平面光波导的波动方程。
Wave equations of a planar waveguide with Fermi index profile are studied theoretically.
曲折光线法和解波动方程是分析平面光波导的基本方法。
The solving of wave equations and tortuous ray method are fundamental methods of analysing plane optical waveguiding.
以上特性显示这些波动可能产生于磁赤道平面附近，在向中高纬传播时被TC - 2观测到。
The above observation reveals that these waves may originate near the equatorial plane and propagated to high latitudes then be observed by TC-2.
推导出了具有一般形式的平面简谐波的波动方程，利用此公式求解波动方程简单而且准确。
The wave equation having general forms of planar simple harmonic wave is deduced in this article. It is simple and accurate to solve wave equation by using this formula.
本文在平面波剩余速度分析方法的基础上提出了基于波动理论的合成震源记录剩余偏移速度分析方法。
We proposed residual migration velocity analysis by synthetic source records based on residual migration velocity analysis in the plane wave domain.
本文将以基底固定的弹性层内的出平面波动为例阐明这一算法，并用一种新的局部透射边界模拟行进波动。
In this paper, the method is illustrated by an example of the anti-plane wave motion in an elastic layer fixed at its base and accuracie…
本文将以基底固定的弹性层内的出平面波动为例阐明这一算法，并用一种新的局部透射边界模拟行进波动。
In this paper, the method is illustrated by an example of the anti-plane wave motion in an elastic layer fixed at its base and acc…
对采用该方法求解点源出平面波动问题时的数值稳定性和精度进行了数值试验研究。
Numerical test study about the stability and precision of the method is made by discussing the solution of SH wave motion.
海相岩石自生矿物中的锶同位素组成可反映其沉积时期的海平面波动趋势。
The Strontium isotope composition of Marine autogenetic minerals can reflect the sea level fluctuation trend during the minerals deposited.
本文给出了正交异性材料反平面间题波动方程的函数不变解。
In this paper the functionally invariant solution of the wave equation of anti-plane problems in the orthotropic material is obtained.
本文通过数值模拟及摄动分析，对平面形状为矩形（简称小包方案）及平面形状为曲边梯形（简称大包方案）的两种盲肠河段的水位波动进行了研究。
In this paper numerical simulation and theoretical analysis are used to study the wave in two different types of sidearm, one is a rectangular channel, another is a trapezoid channel.
提出了一套基于平面波分解的波动方程叠前地震数据深度偏移方法。
Based on plane wave decomposition, We propose a wave-equation depth migration method for pre-stack seismic data.
形成混合沉积的条件是具备碳酸盐和硅质碎屑两类物源、活跃的水动力和干湿交替的气候，此外，海平面的相对波动也会造成积极的影响。
Occurrence of both carbonate and siliciclastic sources, active hydrodynamic regimes, alternate dry and wet climates, and the fluctuation of sea level are main factors for forming mixed sediments.
本文讨论一列平面波与一列平面行波脉冲的声相互作用，显然这两个波不仅都满足波动方程，而且可以用来讨论公共区之外的声散射声问题。
In this paper, the interaction between a cw plane wave and a plane pulse travelling with sound speed is considered. Both of them satisfy the homogeneous wave equation.
本文据古生物学和古生态学资料，论述了建湖地区全新世生物群的演替、海平面波动、古地理变迁和古气候变化。
The purpose of this paper is to study the Holocene biotic variance and to discuss the sea level fluctuation and the palaeoclimatic change in Jianhu area, northern Jiangsu.
提出了一种弹性水平成层半空间中平面内波动斜入射时自由波场时域计算的一维化有限元方法。
A 1d finite element method in time domain is developed, which is used to calculate the in-plane wave motion of free field in elastic layered semispace by oblique seismic incidence.
研究结果表明，在离开敲击端一定距离后，直管中激励出的三维频散波动可以近似地用一维定型平面波描述。
The research results indicate that at a distance from the knocked end, the 3-d dispersed wave motion can be described approximately with 1-d fixed shape wave.
根据横观各向同性介质波动理论，结合波速、波幅的变化规律分析，通过纵波探头平测法，测试了有较大平面的岩块横波在层理面内的偏振波速。
According to the theory of wave crack, the variation rules of wave speed and amplitude, by use of the compressional-wave probe, the polarizing wave speed of rock with large plane is obtained.
根据横观各向同性介质波动理论，结合波速、波幅的变化规律分析，通过纵波探头平测法，测试了有较大平面的岩块横波在层理面内的偏振波速。
According to the theory of wave crack, the variation rules of wave speed and amplitude, by use of the compressional-wave probe, the polarizing wave speed of rock with large plane is obtained.
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