radioactivity

/.reidiәuæk'tiviti/

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大学英语四级大学英语六级

中文翻译

n. 放射性

[化] 放射性

英文解释

n the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay

词态变化

复数形式:radioactivities

常见例句

n a unit of radioactivity equal to the amount of a radioactive isotope that decays at the rate of 37,000,000,000 disintegrations per second s being one more than one hundred

n an alliance made up of states that had been Soviet Socialist Republics in the Soviet Union prior to its dissolution in Dec 1991 n a unit of radioactivity equal to the amount of a radioactive isotope that decays at the rate of 37,000,000,000 disintegrations per second

a unit of radioactivity equal to the amount of a radioactive isotope that decays at the rate of 37,000,000,000 disintegrations per second n

one (with her husband and Henri Becquerel) for research on radioactivity and another for her discovery of radium and polonium (1867-1934)

electronic equipment that detects the presence of radio signals or radioactivity