Specimen可与sample换用，但常指人或物中选出的有代表性部分，或指供科研、化验或检验用的标本。 主要内容如下:分 析介绍了几种常见抽油泵的工作原理、构造 、 适用范围及分类. Ordered the incorrect dimension Television set from the app, but was ready to immediately modify my order within the application also when I identified my blunder several several hours later on. 样品; 样本; （化验的）取样;... https://luxurybestpropertiesgurgaon.blogspot.com/2025/05/experion-trillion-masterpiece-of-ultra.html