radioactivity
英 [ˌreɪdɪəʊæk'tɪvətɪ] 美 [ˌredioækˈtɪvɪti]

n.

放射（性）；辐射能；

英英释义

radioactivity[ ,reidiəuæk'tivəti ]

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

  同义词：radiation

双语例句

用作名词(n.)

1. Radioactivity is a special quality of radium.
   放射性是镭的一种特性。
2. The soil contains 30 times the acceptable level of radioactivity.
   这片土壤受到了高于标准30 倍的辐射。

权威例句

Air chemistry and radioactivity
Air Chemistry And Radioactivity
Air chemistry and radioactivity
Atmospheric Composition. (Book Reviews: Air Chemistry and Radioactivity)
Stratospheric-tropospheric exchange based on radioactivity, ozone and potential vorticity
Fluorographic detection of radioactivity in polyacrylamide gels with the water-soluble fluor, sodium salicylate.
The Preparation of 131I-Labeled Human Growth Hormone of High Specific Radioactivity
THE PREPARATION OF 131I-LABELLED HUMAN GROWTH HORMONE OF HIGH SPECIFIC RADIOACTIVITY
THE PREPARATION OF I-131-LABELLED HUMAN GROWTH HORMONE OF HIGH SPECIFIC RADIOACTIVITY
THE PREPARATION OF ¹³¹I-LABELED HUMAN GROWTH HORMONE OF HIGH SPECIFIC RADIOACTIVITY