1.

1. 恒有度：1、存在度(presence)和恒有度(constancy)群落外貌(physiognomy)是指生物群落的外部形态或表相而言. 它是群落中生物与生物间,生物与环境相互作用的综合反映. 陆地生物群落的外貌主要取决于植被的特征,水生生物群落的外貌主要取决于水的深度和水流特征.

2.

2. 恒定性：(2)根据恒定性(constancy)分为:静态不稳定和动态不稳定. (3)按损伤病因分为:先天性、创伤、炎症、关节炎、肿瘤、医源性等所致的腕关节不稳. (4)按部位分为:桡腕、腕中、腕骨间、腕掌、特殊腕骨、特殊韧带的腕关节不稳.

3. 节操：Feb 19生日花:原野婆婆纳(Field Speedwell)花 语:节 操(Constancy) 原野婆婆纳是七世纪时义大利制力於消除崇拜偶像的传教士-圣巴尔巴道斯节日的花朵.

1. 持久不变;稳定
    Constancy is the quality of staying the same even though other things change.

constancy是什么意思

    e.g. Climate reflects a basic struggle between constancy and change...
           气候反映出稳定与变化之间基本的较量。
    e.g. We live in a world without constancy.
           我们生活在一个瞬息万变的世界。

2. 忠实;忠诚;坚定不移
    Constancy is the quality of being faithful and loyal to a particular person or belief.

constancy是什么意思

    e.g. ...those who have proved their constancy in love.
           那些已经证明了自己对爱情忠贞不渝的人

1. the quality of being enduring and free from change or variation

    e.g. early mariners relied on the constancy of the trade winds

    Synonym: stability

2. faithfulness and dependability in personal attachments (especially sexual fidelity)

3. (psychology) the tendency for perceived objects to give rise to very similar perceptual experiences in spite of wide variations in the conditions of observation

    Synonym: perceptual constancy