英语词汇“radioactive standard”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	radioactive standard
释义	radioactive standard radioactive standard [¦rād·ē·ō′ak·tiv ′stan·dərd] (nucleonics) A sample of radioactive material which contains a known number and type of radioactive atoms at some definite time; used to calibrate radiation measuring instruments.
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