What is the only fermion that may not have an antiparticle?

唯能没有反粒子的费密子是什么？

In practice, obtaining anti particles is a very time-consuming, complex and expensive undertaking.

在实践中，获得反粒子是项非常耗时、复杂昂贵的工作。

A little later, for every 1 billion particles and antiparticles, there was one extra particle.

不久之后，每十亿粒子反粒子，就有额外的粒子。

After all, when an antiparticle meets a particle, a so-called annihilation occurs.

毕竟，当反粒子遇到粒子时，就会发生所谓的湮灭。

If you're lucky and avoid being destroyed by antimatter, you'll be the seed of a future galaxy.

你如果很幸运没被反粒子坏，你就成为了未来星系中的种子。

Scientists tried to answer this question by creating anti particles in laboratory.

科学家们试图通过在实验室制造反粒子来回答这问题。

An electron is created alongside its anti-particle, the positron.

电子与它的反粒子正电子起产生。

The first antiparticle was discovered by American physicist Carl Anderson in 1932.

第反粒子是美国物理学家卡尔·安德森在1932年发现的。

) There could be whole antiworlds and antipeople made out of antiparticles.

) 能存在由反粒子构成的整反反人。

A particle has the same mass as its corresponding antiparticle but opposite charge.

粒子与其相应的反粒子具有相同的质量，但电荷相反。

The reason is that the laws of physics are not quite the same for particles and antiparticles.

原因是粒子反粒子的物理定律并不完全相同。

Back in 1928, the British physicist Paul Dirac suspected the presence of anti particles with an opposite electric charge.

早在1928年，英国物理学家保罗·狄拉克就怀疑存在电荷相反的反粒子。

Quantum fluctuations in empty space are constantly creating pairs of particles and antiparticles, only for them to be annihilated an instant later.

空间中的量子涨落在无时无刻地创造对粒子反粒子，只为了在瞬间之后相互湮灭。

Thus, you emit 180 anti particles per hour in about 4,000 per day.

因此，你每小时释放百八十反粒子，每天大约四千。

And I've seen this one in anti-clockwise All right, so antiparticles are those that are against particles.

我看过这逆时针的 好吧，所以反粒子是那些反对粒子的。

P, and T. The symmetry C means that the laws are the same for particles and antiparticles.

P T。对称性 C 意味着粒子反粒子的定律相同。

Later, thanks to advanced technologies, physicists were able to obtain not just antiparticles, but whole anti-atoms, anti helium, and antihydrogen.

后来，由于先进的技术，物理学家不仅能得到反粒子，而且能得到整反原子、反氦反氢。

Each time scientists create or destroy a new particle, an antiparticle is born or dies accordingly.

每次科学家创造或摧毁新粒子，反粒子就会相应地产生或消亡。

For all the time spent on these efforts, people have only created an insignificant and small dose 19 nano grams of anti particles.

尽管在这些努力上花了这么多时间，人们只制造了种微不足道的小剂量的 19 纳米反粒子。

Every moment, countless quarks pop into existence, along with their anti-particle enemies, before doing furious battle and annihilating each other in an instant.

每时每刻，都有无数的夸克粒子，它们的反粒子敌人起出现，然后进行激烈的搏斗，并在瞬间就互相湮灭。