“relation”的概念、定义、翻译、参考文献-科学参考

单词	relation
释义	relation [ri`lā·shǝn] ^{COMPUTER SCIENCE} A two-dimensional table in which data are arranged in a relational data structure. ^MATHEMATICS A set of ordered pairs.
随便看	pulse wave pulse width pulse-width discriminator pulse-width modulated static inverter pulse-width modulation pulse-width modulation-frequency modulation pulse window pulsing key pulsing transformer pulsometer pultrusion pulverite pulverization pulverizer pulvillus pulvinus puma pumice pumice fall pumiceous pumice stone pumicite pumilith pump pumpability

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。