浓度是日常生活与科技文献中使用频率较高的词。所谓浓度是指某物质 (如物质B)在混合物中的含量。由于所考察的物质及混合物的形态可能不同 ,人们的着眼点也不同 ,自然会对浓度有各种不同的表述方式。科技编辑在化学、化工、环境、医学、农学等书稿及科技论文中会遇到许多种有 Concentration is the word used frequently in everyday life and scientific literature. The so-called concentration refers to a substance (such as substance B) in the mixture content. Due to the different shapes of the substances and mixtures examined, the focus of attention is different, and there are naturally different ways of expressing the concentrations. Science and technology editors in the chemical, chemical, environmental, medical, agronomy and other manuscripts and scientific papers will encounter many kinds of