“null”的概念、定义、翻译、参考文献-科学参考

单词	null
释义	null Physics null①零，零的 ②无效的，无价值的 ③类光[的]^† Mathematics null零的；零 Computer 数据库数据库管理系统及其实现技术释文 null空值
随便看	Middlemarch middle mountain landscape middle of eclipse Middle-of-the Road Line middle oil middle perversity middle plane middle Platonism middle point middle point curve middle point of a triangle middle point triangle Middle Power middle power light emitting diode chip middle qi middle range sub-system middle ring middle route of south-to-north water transfer project Middlesbrough Middle School Students middle seasonal rice middle section mill middle-small scale enterprise middle-square method middle storage pulverizing system

科学参考收录了854744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。