“pulse-propagation meter (PPM)”的概念、定义、翻译、参考文献-科学参考

单词	pulse-propagation meter (PPM)
释义	pulse-propagation meter (PPM) 脉冲传播测定计
随便看	forest-tundra forest type forest utilization forest valuation forest vegetation forest village forest-warden forest weather station forest wind forest workers forest-yaws forest year forest zone forest-zoology fore support foretack forethigh fore-tooth fore tooth foretop foretopman foretopmast foretopsail fore treatment fore trigger

科学参考收录了1248194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。