“ordinary letter”的概念、定义、翻译、参考文献-科学参考

单词	ordinary letter
释义	ordinary letter Encyclopedia 工学信函释 ordinary letter平常信函信函的一种常见形式。邮政企业在收寄时不出具收据，处理时不登记，投递时不要求收件人签收，不接受用户查询。简称平信。
随便看	laser occupational hazard laser optics laser optoacoustic detector laser oscillating conditions laser [oscillation] condition laser oscillation condition laser oscillation threshold laser oscillator laser output characteristic laserparallel fabrication laser parameter detection laser parameter measurement laser parameter measuring method laser parameters laser particle size analyzer laser peen forming laser peening laserphoto laser photoacoustic spectrometry laser photoacoustic spectroscopy laser photoelectric picker laser photography laser photolysis laserphotometer laserphotometry

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。