Title Text:I calculate that the electrons in radiation therapy hit you at 99.8% of the speed of light, and the beam used in a 90-second gamma ray therapy session could, if fired with less precision, kill a horse (they did not let me test this).
Origin:https://xkcd.com/933/
我做過計算，放射治療用的光速 99.8% 的電子，以及伽瑪治療用的 90 秒伽瑪射線，如果用比較低的精準度發射，可以殺死一匹馬（他們不讓我實際測試）。
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