表现度是指在不同的个体中由同一基因产生作用的严重程度不同。当表现极为轻微而无临床意义时称为顿挫型。由于表现度的不一致，能生育后代的患者往往病情较轻，但其孩子的病情常比亲代严重。是突变基因无规律性的一种表达形式。
他们写到，“这些基因表现度的变化貌似是诊断肺部疾病的呼吸道上皮细胞最早期生理异常改变”。
"These changes in gene expression are likely the earliest biologic abnormalities in the small airway epithelium that lead to clinically detectable lung disease," they wrote.
他们写到，“这些基因表现度的变化貌似是诊断肺部疾病的呼吸道上皮细胞最早期生理异常改变”。
“These changes in gene expression are likely the earliest biologic abnormalities in the small airway epithelium that lead to clinically detectable lung disease,” they wrote.
因为它具有复杂的格式，要求用户牺牲表现度，并在转换和维护方面投入大量成本，语义Web将永远不会得到广泛的应用。
Because it's a complex format and requires users to sacrifice expressivity and pay enormous costs in translation and maintenance, the Semantic Web will never achieve widespread public adoption.
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