量子真空中自发产生的虚粒子以不被察觉的速度出现与消失。
The virtual particles spontaneously created in the quantum vacuum appear and then disappear so quickly that they can't be directly observed.
由于它们的存在这样的短暂，他们经常被称作虚粒子。
Since their existence is so fleeting, they are usually referred to as virtual particles.
这个理论告诉我们，在任何给定体积的量子真空中都存在数不清的由虚粒子产生的电偶极子。
According to theory, there are countless electric dipoles created by virtual particles in any given volume of the quantum vacuum.
量子物理学认为，真空并不是真正是空的，而是沸腾的海洋——被称作虚粒子与反粒子的东西不停出现与消失。
According to quantum physics, empty space is not actually barren but is a boiling sea of so-called virtual particles and antiparticles constantly popping in and out of existence.
充满“虚”粒子的真空。
微分散射截面的变化主要依赖于相对介电常数实部、虚部数值较大的一方，并且随粒子取向角的增大而增大。
The variation of DSCS depends on the larger part between real part and imaginary part of dielectric coefficient. The DSCS and azimuth angle are in proportional relation.
运用两维半、全电磁模型的MAGIC程序对同轴式反射三极管中的虚阴极振荡现象进行了粒子模拟研究。
In this paper the phenomena of the virtual cathode oscillation in coaxial reflex triode are investigated by means of two and one half dimensional and fully electromagnetic MAGIC code.
在本文中我们得到了极化和关联所贡献的单粒子位虚部的解析表达式，并通过色散关系计算了它们对单粒子位实部的贡献。
The imaginary parts of the polarization and correlation contributions are calculated analytically and the real parts of them are obtained by means of dispersion relation.
在本文中我们得到了极化和关联所贡献的单粒子位虚部的解析表达式，并通过色散关系计算了它们对单粒子位实部的贡献。
The imaginary parts of the polarization and correlation contributions are calculated analytically and the real parts of them are obtained by means of dispersion relation.
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