It is concluded that the four-step model should be considerably revamped due to many existing issues, and that the improvement process should be undertaken in an incremental and orderly way.
传统的四阶段模型在模拟精明增长方面有许多问题，应当进行全面的改进，但是必须循序渐进，逐步完善。
The pathogenesis of nonalcoholic steatohepatitis and other fatty liver diseases: a four-step model including the role of lipid release and hepatic venular obstruction in the progression to cirrhosis.
非酒精性脂肪性肝炎和其他脂肪性肝病的发病机制：四步模型，包括肝硬化进展的脂质释放和肝微梗阻的作用。
The couple had four children together, and Osama spent most of his childhood living with his step-siblings, and attending Al Thagher Model Schoolat the time the most prestigious high school in Jedda.
这对夫妇总共有4个小孩，奥萨马大部分的童年时光就是和他同父异母的兄弟姐妹度过的，后来他上了吉达当时最有名望的高中al Thagher Model Schoolat。
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