辐射怎么样(辐射)
063 辐射有多危险？
How Dangerous is Radiation
（https://www.nuclear-power.com/）
辐射有多危险?
电离辐射—危险性符号
Radiation is all around us. In, around, and above the world we live in. It is a natural energy force that surrounds us. It is a part of our natural world that has been here since the birth of our planet. All living creatures, from the beginning of time, have been, and are still being, exposed to ionizing radiation.
辐射在我们周边无处不在。包括我们生活的世界里面，周围，上面。它是围绕着我们的一种天然能量的力量。它是我们自然界的一部分，自我们的星球诞生以来就一直存在。所有的生物，从一开始，就一直暴露在电离辐射中，现在依然如此。
For example, potassium-40 is one of isotopes which contributes to internal exposure of human. Traces of potassium-40 are found in all potassium, and it is the most common radioisotope in the human body. Higher amounts can be also found in bananas. Does it mean, eating bananas must be dangerous? Of course not.
例如钾-40就是其中一种导致人体内照射的同位素。所有钾元素中都含有钾-40的痕迹，它是人体中最常见的放射性同位素。在香蕉中也可以发现更高的含量。这是否意味着，吃香蕉一定是危险的？当然不是。
Whether the source of radiation is natural or man-made, whether it is a large dose of radiation or a small dose, there will be some biological effects. In general, ionizing radiation is harmful and potentially lethal to living beings but can have health benefits in medicine, for example, in radiation therapy for the treatment of cancer and thyrotoxicosis.
无论辐射源是天然的还是人工的，无论是大剂量还是小剂量的辐射，都会有一定的生物效应。一般来说，电离辐射对生物是有害的，并有可能致命，但在医学方面，例如在治疗癌症和甲状腺机能亢进的放射治疗方面，电离辐射对健康有益。
- But where is the threshold between positive and negative effects of radiation?
- 但是辐射的正面和负面影响的界限在哪里呢?
- What does danger mean?
- 危险是什么意思?
In the following thoughts, we try to summarize facts and hypothesis, which can help you understand the problem. It is all about the risks arising from exposure to ionizing radiation and about the consistency in all risks of everyday life. But first we have to summarize key facts about ionizing radiation.
在下面的思路中，我们尝试总结事实和假设，这可以帮助你理解该问题。这都是关于暴露于电离辐射的风险以及日常生活中所有风险的一致性。但首先我们要总结一下电离辐射的关键事实。
注：
（以下内容来自百度百科）
辐射（Radiation）指的是由发射源（电磁波等）发出的电磁能量中一部分脱离场源向远处传播，而后不再返回场源的现象，能量以电磁波或粒子（如阿尔法粒子、贝塔粒子等）的形式向外扩散。
自然界中的一切物体，只要温度在绝对温度零度（约-273.15摄氏度）以上，都以电磁波和粒子的形式时刻不停地向外传送热量，这种传送能量的方式被称为热辐射。
辐射的能量从辐射源向外所有方向直线放射。物体通过辐射所放出的能量称为辐射能。辐射按伦琴 /小时(R)计算。辐射有一个重要特点，就是它是“对等的”。不论物体（气体）温度高低都向外辐射，甲物体可以向乙物体辐射，同时乙也可向甲辐射。一般普遍将这个名词用在电离辐射。
辐射本身是中性词，但某些物质的辐射可能会带来危害。
（待续）
