| 释义 |
con·stance
\ˈkänztən(t)s, -änst-\ noun
(-s)
Etymology: Middle English constaunce, from Middle French constance, from Latin constantia
1. obsolete : constancy 1, 3
2. : the relative occurrence of a kind of organism (as a species) in several examples of a particular type of ecological community based on counts of sample plots of uniform size in each example and commonly expressed as a percentage of the whole population of the sample plot |