“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	Archaeological Site of Olympia Archaeological Site of Panamá Viejo and Historic District of Panamá archaeological site of Yin Xu Archaeological Sites of Mycenae and Tiryns archaeological statistics archaeological survey Archaeological Surveying and Mapping archaeological surveying and mapping Archaeological Unfolded Drawing Archaeology and Cultural Relics Archaeology of SumerIan and Akkadian Archaeomagnetic Dating Archaeometry archaeometry archaeopterids archaeozoic eon Archaeozoic Era Archaic Age archaic Chinese initials archaic Chinese rhymes Archaic Greece archaic Homo sapiens archaic ungulata archaic word archaistic bronzes of the Song Dynasty

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