“grade line”的概念、定义、翻译、参考文献-科学参考

单词	grade line
释义	grade line [¦grād `līn] ^{CIVIL ENGINEERING} A line or slope used as a longitudinal reference for a railroad or highway.
随便看	drive winding drive wire driving clock driving force driving pinion driving-point function driving-point impedance driving resistance driving signal driving wheel drizzle drizzle drop DRM drogue Dromadidae dromedary Dromiacea Dromiceidae dromophobia drone drooped ailerons droop governor drop drop ball drop bar

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。