The primary meristem of the root tip may be extended a section of distance below the elongation region.
根尖的初生分生组织可扩大到伸长区下方一段距离。
Objective: to study the relationship between pulse position and dynamic variation of distance from transverse section centroid of radial artery to skin during a cardiac cycle.
目的：探讨周期运动过程中桡动脉横切面轴心到皮肤距离的动态变化与脉位的关系。
Objective: to study the relationship between pulse position and dynamic variation of distance from transverse section centroid of radial artery to skin during a cardiac cycle.
目的：探讨周期运动过程中桡动脉横切面轴心到皮肤距离的动态变化与脉位的关系。
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