| 单词 | half-life |
| 释义 | ˈhalf-lifenoun [c] (technical术语) the time taken for the radioactivity (= the amount of harmful rays sent out when an atom breaks up) of a substance to fall to half its original value （放射性物质的）半衰期 |
| 随便看 |
|
英汉双解词典收录171353条英汉汉英双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。