And although Asimov's "positronic" brains do not exist, positrons are indeed used to probe human brains in positron-emission tomography (PET) scanning.
虽然阿西莫夫虚构的“正电子”大脑并不存在,但是正电子理论确确实实被应用于正电子衍射成像(PET)扫描技术上用来探索人类大脑。
Technically, the U.S. Food and Drug Administration is responsible for ensuring that pet foods, like human foods, are safe to eat, truthfully labeled and produced under sanitary conditions.
从技术上而言,美国食品与药品管理局(FDA)对宠物食品负责,确保它们要像人类食品一样,要能安全食用,如实地贴上标签,并且要在卫生的条件下被生产出来。
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