| 释义 |
〔cline〕A gradual change in a character or feature across the distributional range of a species or population, usually correlated with an environmental or a geographic transition.渐变群，生态群：在特性或特征上穿越物种或人口的分布区域的逐渐变化，通常与环境或地理变迁相关〔shadow〕To change by gradual degrees.渐变：逐渐变化〔drift〕A gradual change in position.位置的逐渐变化〔gradate〕To cause to pass imperceptibly from one degree, shade, or tone to another.使逐渐变化：导致等级，色调或音调不知不觉地变化 |