“定题服务”概念、定义、翻译-科学时代

单词	定题服务
释义	图书馆、情报与文献学词汇手册定题服务 SDI（selective dissemination of information）
随便看	proton-induced X-ray emission analysis proton irradiation proton irradiation simulation protonium proton linear accelerator proton magnetic moment proton magnetic resonance proton magnetometer proton magnetometer proton microbeam proton microscope proton number protonosphere proton-precession magnetometer proton-precession magnetometer proton-proton chain reaction proton-proton reaction proton pump proton reaction proton recoil chamber proton recoil counter proton recoil detector proton recoil radiator proton recoil track proton resonance

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。