“SA政策”概念、定义、翻译-科学时代

单词	SA政策
释义	测绘学词汇手册 SA政策 SA（selective availability）
随便看	nitrogen dioxide reaction nitrogen-doped silicon crystal nitrogen equilibrium nitrogen family explosive nitrogen fertilizer nitrogen fertilizer nitrogen fertilizer nitrogen fill valve nitrogen fixation nitrogen fixation nitrogen fixation nitrogen fixation nitrogen fixation nitrogen fixation nitrogen fixation nitrogen fixation by rhizobia nitrogen fixing algae nitrogen-fixing bacteria nitrogen-fixing bacteria nitrogen fixing plant nitrogen fixing plant nitrogen-free extract nitrogen-free extract--nitrogen-free extract（NFE） nitrogen-free extract（NFE） nitrogen gas distribution board

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。