| 单词 | activity |
| 释义 | Word Frequency activity(ækˈtɪvɪtɪ) nounWord forms: plural -ties 1. the state or quality of being active 2. lively action or movement 3. any specific deed, action, pursuit, etc recreational activities 4. the number of disintegrations of a radioactive substance in a given unit of time, usually expressed in curies or disintegrations per second 5. a. the capacity of a substance to undergo chemical change b. the effective concentration of a substance in a chemical system. The absolute activity of a substanceB, λB, is defined as exp (μBRT) where μB is the chemical potential |
| 随便看 |
英语词典包含233703条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。