大脑皮层密度的降低与每天大量消耗香烟有关，还与抽烟者的年龄有关系。
The thickness of this region decreased in relation to heavier daily consumption of cigarettes and the number of years a person had been a smoker.
本文用逐步回归方法探求涤纶仿真丝织物的柔软、 悬垂性和织物结构参数之间的关系。得出改善悬垂性除与原料有关外，还需增强丝线的捻度，降低织物的密度和单丝纤度。
In this paper, step-by-step regression analysis is used to seek the relations of fabric construction parameters to the flexibility and fabric fall of silk-like polyester fabric.
本文用逐步回归方法探求涤纶仿真丝织物的柔软、 悬垂性和织物结构参数之间的关系。得出改善悬垂性除与原料有关外，还需增强丝线的捻度，降低织物的密度和单丝纤度。
In this paper, step-by-step regression analysis is used to seek the relations of fabric construction parameters to the flexibility and fabric fall of silk-like polyester fabric.
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