（七）射线装置，是指在接通电源后方能产生电离辐射的装置，如X射线机、加速器、中子发生器等。
A common sentiment expressed by readers is that the language starting from 1200 AD is a foreign and incomprehensible. I am not sure I would agree. While Old English absolutely requires some effort to learn, I think with a little analysis it is much closer to Modern English than we think - and certainly closer to that than it is to say, Modern German.
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