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单词 Nuclear Radiation
释义

Nuclear Radiation

原声例句
TED-Ed(视频版)

Nuclear radiation comes from natural sources, like radon, a gas which seeps up from the ground.

核辐射来源于自然物质,例如氡,一种从地下渗出的气体。

CNN 精选 2016年3月合集

The threat from nuclear radiation remains.

而核辐射的威胁仍然存在。

TED-Ed(视频版)

All nuclear radiation is ionizing, while only the highest energy electromagnetic radiation is.

所有的核辐射都是电离,然而电磁辐射只有最高能量的才是。

CNN 精选 2015年8月合集

About 30 people were killed in the blast, and the nuclear radiation spread across borders.

此次爆炸造成30多人丧生,而核辐射甚至扩散到邻国。

TED-Ed(视频版)

Nuclear radiation, on the other hand, originates in the atomic nucleus, where protons repel each other due to their mutually positive charges.

另一边呢,核辐射源于原子核,带有正电荷的质子正正相斥。

经济学人-科技

As in real warfare, those weapons may be conventional (surgery), chemical (cancer-killing drugs) or nuclear (radiation therapy).

就像在真实的战场上一样,这些武器可能是常规武器(外科手术),化学武器(抗癌药物),或者核武器(放射治疗)。

TED演讲(音频版) 2014年4月合集

The long-lasting damage of nuclear radiation caused an entire city and its population to turn into powder.

核辐射的长期损害 致使整个城市和它的人口 化为粉末。

TED-Ed(视频版)

The answer begins with understanding that the word radiation describes two very different scientific phenomena: electromagnetic radiation and nuclear radiation.

电磁辐射和核辐射。

CNN 听力 2019年8月合集

To be clear, whatever happened last Thursday did not appear to have given off a large plume of nuclear radiation like the Chernobyl disaster did.

需要明确的是,上周四发生的事故似乎并未像切尔诺贝利灾难那样释放出大量核辐射。

当月 CNN 10 学生英语 2019年8月合集

To be clear, whatever happened last Thursday did not appear to have given off a large plume of nuclear radiation like the Chernobyl disaster did but more than 30 years later Chernobyl's effects are still rippling across Russia.

需要明确的是,上周四发生的事情似乎并没有像切尔诺贝利核事故那样释放出大量的核辐射,但30多年后,切尔诺贝利的影响仍然波及整个俄罗斯。

中文百科

放射性 Radioactive decay

(重定向自Nuclear Radiation)
放射性的标志。Unicode所收录的编码为U+2622(☢)
1907年居里夫妇及他们在巴黎的实验室
放射性和侦测到电离辐射之间的关系
 α粒子的穿透力最小,一张纸可挡住。β粒子可由铝屏蔽。伽玛射线穿透力强,必须使用实质性的障碍,例如一层非常厚的铅,但仍然未能完全阻挡[8]。

放射性是指元素从不稳定的原子核自发地放出射线,(如α射线、β射线、γ射线等)而衰变形成稳定的元素而停止放射(衰变产物),这种现象称为放射性。衰变时放出的能量称为衰变能量。原子序数在83(铋)或以上的元素都具有放射性,但某些原子序数小于83的元素(如锝)也具有放射性。而有趣的是,从原子序93开始一直到锫元素有以下特性:原子序是偶数的,半衰期都特别长。由于偶数元素的原子核含有适当数量的质子和中子,因此形成有利的配置结构。〈即魔数〉

对单一原子来说,放射性衰变依照量子力学是随机过程,无法预测特定一个原子是否会衰变。不过原子衰变的机率不会随着原子存在的时间长短而改变。对大量的原子而言,可以用量测衰变常数计算衰变速率及半衰期。其半衰期没有已知的时间上下限,范围可以到55个数量级。

英语百科

Radioactive decay 放射性

(重定向自Nuclear Radiation)
Alpha decay is one type of radioactive decay, in which an atomic nucleus emits an alpha particle, and thereby transforms (or
Pierre and Marie Curie in their Paris laboratory, before 1907
Taking an X-ray image with early Crookes tube apparatus in 1896. The Crookes tube is visible in the centre. The standing man is viewing his hand with a fluoroscope screen; this was a common way of setting up the tube. No precautions against radiation exposure are being taken; its hazards were not known at the time.

Radioactive decay, also known as nuclear decay or radioactivity, is the process by which the nucleus of an unstable atom loses energy by emitting radiation, including alpha particles, beta particles, gamma rays and conversion electrons. A material that spontaneously emits such radiation is considered radioactive.

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更新时间:2025/6/24 7:45:23