单词 | activity |
释义 | activity [´ak`tiv·ǝd·ē] COMPUTER SCIENCE The use or modification of information contained in a file. NUCLEAR PHYSICS The intensity of a radioactive source. Also known as radioactivity. PHYSICAL CHEMISTRY A thermodynamic function that correlates changes in the chemical potential with changes in experimentally measurable quantities, such as concentrations or partial pressures, through relations formally equivalent to those for ideal systems. SYSTEMS ENGINEERING The representation in a PERT or critical-path-method network of a task that takes up both time and resources and whose performance is necessary for the system to move from one event to the next. |
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科学参考收录了103327条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。