n.反物质(由反粒子组成)

Antimatter is the counterpart of matter, with each particle having an antimatter counterpart with opposite properties.
反物质是物质的对应物，每种粒子都有与其性质相反的反物质对应物。
When matter and antimatter meet, they annihilate each other, releasing enormous amounts of energy.
当物质与反物质相遇时，它们会相互湮灭，释放出巨大的能量。
Antimatter is extremely rare in our observable universe, which is primarily composed of matter.
在我们可观察到的宇宙中，反物质极其稀少，主要由物质构成。
Scientists are still unsure why there's more matter than antimatter in the universe.
科学家们仍然不确定为什么宇宙中的物质多于反物质。
The Large Hadron Collider (LHC) can produce small quantities of antimatter for research purposes.
大型强子对撞机（LHC）可以产生少量的反物质用于研究。
Antimatter particles, like positrons, have the same mass as their matter counterparts but opposite charge.
反物质粒子，如正电子，具有与物质对应的粒子相同的质量但电荷相反。
In theory, antimatter engines could power spaceships for interstellar travel, though currently, it's technologically unfeasible.
理论上，反物质引擎可以为星际旅行的宇宙飞船提供动力，尽管目前在技术上还不可行。
Studying antimatter can help us understand fundamental symmetries and laws of physics.
研究反物质可以帮助我们理解基本的对称性和物理定律。
The existence of antimatter was first predicted by Paul Dirac in 1928 through his relativistic quantum mechanics.
反物质的存在最早是由保罗·狄拉克在1928年通过他的相对论量子力学预测的。
Antimatter has potential applications in medical imaging, such as Positron Emission Tomography (PET) scans.
反物质在医学成像中具有潜在的应用，例如正电子发射断层扫描（PET）技术。