The follicle layer of derma was developed during the embryonic period and it had a constant thickness in each stages of age (P>0.05).

真皮的毛囊层在胚胎时期就已发育形成，其厚度在各年龄段基本趋于一致（P＞0．05）。

youdao

Combined with modern optimization theory, a method of size optimization for annular fins with constant thickness is derived from theory of heat conduction and temperature distribution in fins.

从热传导原理、肋片的温度分布特性等，与现代优化设计理论相结合，导出了一种关于等厚度环肋的尺寸优化的方法。

youdao

Each fringe is the locus of all points in the film for which the optical thickness is a constant.

每一个条纹就是膜上一切光学厚度为常数的点的轨迹。

youdao

In 2008, Trina is determined to "lower our module manufacturing costs through constant improvements in cell efficiencies, wafer thickness reduction, and manufacturing process innovation, " he added.

FORBES: Magazine Article