sequential steps

The theoretical foundation of energy flow structure model is introduced, including the main energy flow structure model during the development process of process system engineering, steps of process system analysis and sequential modular approach.

介绍能流结构模型的理论基础，包括过程系统工程发展过程中主要的能流结构模型、过程系统分析的步骤及序贯模块法。

Multiple myeloma ( MM) develops through several sequential and interrelated steps such as the progressive dysregulation of genes.

多发性骨髓瘤（multiple myeloma，MM）的发生发展是通过一系列连续、相关的步骤，如渐进性的基因失调。

Meanwhile, the bioavailability and mobility of the selected heavy metals in typical soil samples were assessed by BCR three-steps sequential extraction procedure, soil certified reference materials ( BCR& 701) were used for analytical quality control.

同时，本文选取代表性土壤样品，采用欧共体标准测量与检测组织的BCR三步逐级提取法分析了土壤中6个重点元素的化学形态，采用BCR土壤标样（BCR-701）控制分析质量。