“variety”的概念、定义、翻译、参考文献-科学参考

单词	variety
释义	variety [vǝ`rī·ǝd·ē] ^SYSTEMATICS A taxonomic group or category inferior in rank to a subspecies. ^{SYSTEMS ENGINEERING} The logarithm (usually to base 2) of the number of discriminations that an observer or a sensing system can make relative to a system.
随便看	optical pulse optical-pulse compression optical pumping optical pyrometer optical quenching optical radar optical rangefinder optical reader optical recording optical rectification optical reflectometer optical relay optical-righting reflex optical rotation optical rotatory dispersion optical scanner optical sight optical sound head optical sound recorder optical sound reproducer optical spectra optical spectrograph optical spectrometer optical spectroscope optical spectroscopy

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。