“methods of sampling”的概念、定义、翻译、参考文献-科学参考

单词	methods of sampling
释义	methods of sampling Encyclopedia 理学【试剂和试样】释 methods of sampling试样准备包括取样和试样制备两步。前者是指从大量物料（分析对象的总体）中取得其中有代表性的一小部分，即在误差允许范围内，这一小部分试样应能代表大量物料的组成。后者是把按一定程序取得的仍然颗粒较大的试样，经过破碎、缩分、研磨、过筛等步骤，制备成适合于作分析用的试样。
随便看	principle of faunal succession principle of Fermat principle of final common path principle of free provenance principle of frequency modulation measurement principle of functoriality principle of general covariance principle of general elimination of quantitative restriction principle of general relativity principle of geometric reverse principle of geophysical exploration principle of good faith and honesty principle of hard and soft acids and bases principle of hard and soft acids and bases (HSAB principle) principle of harmonic measure principle of health maintenance with drugs Principle of historical cost principle of hyperbolic measure principle of implicit measurement principle of inclusion and exclusion principle of inclusion exclusion principle of inclusion-exclusion principle of indemnity principle of independence principle of independent action of forces

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。