“materials with acoustic gradad index”的概念、定义、翻译、参考文献-科学参考

单词	materials with acoustic gradad index
释义	materials with acoustic gradad index Encyclopedia 理学声学超常材料释 materials with acoustic gradad index声梯度折射率材料一种非均质的复合材料，它的组分和结构在材料内部按一定规律连续变化，从而使折射率也相应地呈连续变化。
随便看	population persistence population pharmacokinetics，PPK population planning population policy population pressure population process population protected mode of medicinal resources Population pyramid Population quantity population random distribution population recruitment Population Registers population regulation population resource population-shift algorithm population size population sociology population spatial distribution population stability population standard deviation population statistics population structure population subdivision population survey population synthesis

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。