請用自己語言解釋輻射!

You need to differentiate between radiation (輻射) and radioactive substances (放射物質). Radiation is basically energy, such as gamma rays, or energy carried by fast moving particles, such as alpha, beta and neutrons. Radioactive substances are matters, they emit radiation.


Half-life (半衰期) applies to radioactive substances. It is the time that the activity of a radioactive substance decreases to half of its original value.

Being a matter, radioactive substances could be tansported by winf, and deposited onto agricultural land, thus leading to radioactive contamination of food produces. Radioactive substances could also be deposited onto rivers, lakes and sea, causing contamination of drinking water and marine species correspondingly.

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我自己都去開, 希望可以幫到你~ ^T^