1938, in biological use, back-formation from incline or from Greek klinein "to slope, to lean" (see lean (v.)). Middle English had clinen (v.) "to bend, bow," from Old French cliner, from Latin clinare.
实用例句
1. Such a range of variation is termed a cline.
这样一个变异区域称为梯度变异.来自辞典例句
2. Callaham and Liddicoet found an elevational cline in ponderosa pine from Northern California.
卡拉汉和利狄柯特发现加利福尼亚北部产的黄松有一海拔渐变群.来自辞典例句
3. Often individuals at either end of a cline are reproductively isolated.
通常,在两个变异群中的个体是繁殖隔离的.来自互联网
4. The expanding enrollment of college and university result in the de - cline of teaching quality.
