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单词 A particle
释义

A particle

英语例句库

There's not a particle of truth in her story.

她讲的没有一句实话。

原声例句
雅思词汇例句

He has not a particle of malice in him.

他没有一点恶意。

Emma的美味英语

A particle is either a preposition or an adverb right?

小品词是介词或副词对吗?

Emma的美味英语

A particle in a phrasal verb is either a preposition or an adverb.

动词短语中的助词既可是一个介词也可以是一个副词。

连线杂志

Each mode can be called a particle.

每一种模式都可以称为一个粒子。

宇宙奥秘

So, what does a particle look like then?

所以,粒子看起来是什么样子?

小故事大纪实

But wait, what exactly does a particle collider do.

等等,粒子对撞机到底是做什么的?

TED演讲(视频版) 2016年1月合集

It sounds funny for a particle physicist to say that.

这从一个粒子物理学家嘴里 说出来也许很滑稽。

中高级英语短文

Sometimes light is a wave, sometimes it's a particle.

有时光是波,有时是粒子。

夏洛的网

Not a particle. People believe almost anything they see in print.

“一丁点也没关系。看到印出来的东西,发表出来的东西,人们都会相信的。

宇宙奥秘

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。

VOA慢速英语_单词故事

Phrasal verbs have a verb and a particle, a kind of short word.

动词短语中包含动词和小品词(一种很短的词)。

科学大揭秘

This, he called superposition, where a particle exists in a combination of states.

他称之为叠加,即粒子以多种状态的组合存在。

假如有如果

In this system, a particle could go back in time to where it started.

在这个系统中,粒子可以回到最初的地方。

双语版 TED-Ed 演讲精选

You're a particle of matter, amidst a chaotic stew of forces, fusion, and annihilation.

你是一颗物质粒子,身处力量、融合和湮灭的混乱中。

宇宙奥秘

By looking at a particle, we change it.

为了观测它,我们改变了它的性质。

高级每日语法(音频版)

Phrasal verbs have a verb and either a preposition or an adverb called a particle.

短语动词由一个动词和一个介词或一个称为助词的副词组成。

生活大爆炸 第8季

Yeah, I listen to what you say. You're building a particle detector using superfluid helium.

当然,你的话我都有好好听。你正在用超流氦打造一个粒子探测器。

宇宙奥秘

We decided that we would pretend that a particle is a point in space.

我们决定假设,粒子在空间中只是一个点。

爷爷奶奶的词汇课

Most phrasal verbs are made up of a verb, and another little word — a particle.

大多数动词短语是由一个动词和另一个小词——小品词(形似介词的副词)组成。

当月 VOA Special English

The diameter of human hair, for example, is about 30 times larger than a particle of 2.5 microns.

例如,人类头发的直径大约是2.5微米颗粒物的30倍。

中文百科

Α粒子 Alpha particle

(重定向自A particle)
一个α粒子在磁场中偏转
α衰变
α粒子相当于氦的原子核可被纸所阻挡,β粒子相当于电子可被铝箔所阻挡,γ射线则具有高穿透性。
A physicist observes alpha particles from the decay of a polonium source in a cloud chamber

α粒子英语:Alpha particle)是一种放射性粒子,由两个质子及两个中子组成,并不带任何电子,亦即等同于氦-4的内核,或电离化后的氦-4,He。

通常具有放射性而原子量较大的化学元素,会透过α衰变放射出α粒子,从而变成较轻的元素,直至该元素稳定为止。由于α粒子的体积比较大,又带两个正电荷,很容易就可以电离其他物质。因此,它的能量亦散失得较快,穿透能力在众多电离辐射中是最弱的,人类的皮肤或一张纸已能隔阻α粒子。

英语百科

Alpha particle Α粒子

(重定向自A particle)
A physicist observes alpha particles from the decay of a polonium source in a cloud chamber
Alpha radiation consists of helium-4 nucleus and is readily stopped by a sheet of paper. Beta radiation, consisting of electrons, is halted by an aluminium plate. Gamma radiation is eventually absorbed as it penetrates a dense material. Lead is good at absorbing gamma radiation, due to its density.
An alpha particle is deflected by a magnetic field

Alpha particles consist of two protons and two neutrons bound together into a particle identical to a helium nucleus. They are generally produced in the process of alpha decay, but may also be produced in other ways. Alpha particles are named after the first letter in the Greek alphabet, α. The symbol for the alpha particle is α or α. Because they are identical to helium nuclei, they are also sometimes written as He2+ or 4
2
He2+ indicating a helium ion with a +2 charge (missing its two electrons). If the ion gains electrons from its environment, the alpha particle can be written as a normal (electrically neutral) helium atom 4
2
He
.

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更新时间:2025/6/21 13:27:42