1.effects of the pubescence depend on four main characteristics of the trichomes: density, erectness , length, and shape.
一般来说，柔毛的机械作用取决于毛状体的四个主要性状：密度、直立性、长度和形状。
2.Enhancement arm muscle: Erectness, grasping dumb bells with right hand, repeating several times, then changing left hand.
增强臂肌：直立，用右手握哑铃举起，反复几次，然后换左手。
3.You would notice that they are eager toward life, there is a certain sparkle in their eye, an erectness to their carriage.
你会注意到，他们渴望生活，眼睛里有某种东西在发光，身板挺直。
4.Experimental Study on Erectness Percentage of Seedling of Naked Root Transplanting for Flexible Disc Transplanter
机械化移栽裸根苗的直立率试验研究