这个理论认为，在早期的时候，地球曾经被一颗火星般大小(相当于地球体积的一半)的行星撞击。
An object about the size of mars-half the size of earth-slammed into our planet very early in its formation, the theory says.
现有理论认为在大约40亿年前，一个火星大小的天体撞击了原始地球，星球被装出的部分最终形成了现在的月球。
Current thinking is that some 4 billion years ago, a Mars-sized object smashed into the proto-Earth, knocking off a chunk of planet that eventually formed into the moon.
主流的理论假设认为，月球是大爆炸时期一火星大小的物体猛烈撞击地球而形成的。
The prevailing hypothesis is that the moon was formed from a giant impact event, when a Mars-sized object slammed into Earth.
另外一个理论推测大型动物在13000年前的一次小行星撞击中被毁灭殆尽，然而最新的研究也否定了这种可能性。
Another theory, that the larger beasts were wiped out by an asteroid strike around 13, 000 years ago, also looks unlikely in view of the latest study.
目的探讨撞击参数与影响损伤严重程度的撞击力之间的相互关系，以期为致伤机制和医学防护提供理论依据。
Objective to evaluate the relation between impact parameters and impact force, so as to provide theoretical basis for damage mechanism and medical protection.
通过对枪弹撞击玻璃所产生的破碎裂纹进行了理论分析及实验，得出了玻璃袭纹与射击距离的关系。
According to the experiments and theory analysis of the crackle on the glass by bullet hitting, we get the relationship between the glass crackle and the distance of shooting.
根据一维应力波传播理论，提出了圆柱壳受轴向撞击破坏的简化模型，分析了这一破坏过程中的能量变化。
Based on the one dimensional wave propagation theory, a simple dynamic model was presented to analyze the failure process and energy absorption of the shells under impact loading.
柱形弹体撞击塑性变形的G.I。泰勒理论的分析解及其改进。
The Analytical Solution of G. I. Taylor's Theory of Plastic Deformation in impact of Cylindrical Projectiles and its Improvement.
该理论阐述了多次碰撞，某种对地球的撞击，第二次是在双胞胎月球之间。
Multiple collisions are theorized, some sort of collision with the Earth, and then a second collision between twin Moons.
提出金的宇宙来源及撞击成矿理论。
Theory that gold originates from the universe and impact metallogenic process has been put forward.
这导致小行星撞击造成恐龙灭绝的理论现在广为接受。
This led to the now widely accepted theory that the consequences of an asteroid impact had wiped out the dinosaurs.
根据一种对于月球形成的理论，一个火星大小的物体在十亿年前撞击了年轻的地球。
According to one of the theories of the Moon's formation, a Mars-size object collided with the young Earth billions of years ago.
本文用简化的力学模型对龙门起重机和装卸桥小车撞击缓冲器时的动力响应进行理论分析。
Resorting to a simplified mechanical model, this paper makes a theoretical analysis of the dynamic response of the gantry crane and loading bridge when their their trolleys collide with buffers.
BF理论从一个新的视角对金融市场进行了分析，对传统的理性金融理论产生了强有力的撞击。
The BF Theory contains financial market analyses from a new view. It made a great impact on the traditional rational financial theory.
对于第一阶段运用矢量分析和激波理论关系，建立了适用于高速撞击条件的非线性激波模型。
Vector analysis and shock wave theory are applied to the initial phase during which the contact periphery expands more quickly than the compression wave fronts in the droplet.
虽然蓝宝石表镜硬度高，理论上只有金刚石才能划伤它，但不代表就万事大吉，还要防止撞击和掉落震碎表镜。
Although high hardness sapphire table mirror, only the diamond can cut it in theory, but does not mean that everything is all right, but also to prevent collision and fall break table mirror.
根据一维应力波传播的理论，提出了圆柱壳受轴向撞击破坏的简化模型，分析了这一破坏过程中的能量变化。
Based on the one-dimensional wave propagation theory, a simplified dynamic model was presented to analyze the failure and energy absorption of the tubes under impact load.
分析了岩石在撞击过程中的能量转化及其升温机理，推导出了理论升温公式。
The energy transformation and heating-up mechanism in the course of the rock ram are analyzed, and the theoretical heating-up formula is acquired.
有些理论将两极转化现象归因于诸如陨星撞击等外部因素。
Several theories link polarity flips to external disasters such as meteor impacts.
新的研究结果挑战了小行星撞击导致恐龙灭绝并引起全球大爆炸的理论。
New research challenges the idea that the asteroid impact that killed the dinosaurs also sparked a global firestorm.
本文综述了撞击流技术的理论研究和应用研究进展，并给出了实际操作示例；论述了撞击流技术的应用前景。
In this paper, research progress of theory and application on impinging streams is reviewed. Several operating examples are given. The industrial prospects on impinging stream technique are discussed.
利用实验和磁流理论的分析，证实了撞击杆中磁流的存在。
In this paper, both experimental results and analysis of the magnetic current theory demonstrate the occurrence of the magnetic current in stricken ferromagnetic bar.
同时地球也遭受着其残骸的撞击——尽管我们不平静的地球已经用“板块构造理论”抹去了这些伤痕。
The Earth would have been pummelled by debris at the same time, although plate tectonics on our restless planet have since erased the scars.
对矩形截面自由梁在两端同时受到完全相同的集中质量横向撞击问题进行了理论上的研究 ，通过采用刚塑性的材料模型得到了其动力响应完全解。
The dynamic response of a free free beam with uniform rectangular cross section subjected to impact by a mass at both free end is analyzed theoretically.
做到这点，理论上我们可以通过研究一个巨大的撞击坑，比如南极ak盆底，它位于月球南极地区。
We could do this in theory by studying an enormous impact crater, known as the south Pole AK basin. It's located in the moon's south polar region.
做到这点，理论上我们可以通过研究一个巨大的撞击坑，比如南极ak盆底，它位于月球南极地区。
We could do this in theory by studying an enormous impact crater, known as the south Pole AK basin. It's located in the moon's south polar region.
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