As in many widely separated families of plants, single species and single genera possess the power of revolving, and have thus become twiners, they must have independently acquired it, and cannot have inherited it from a common progenitor.

许多相距甚远植物科中， 单个物种和单个属具有旋转能力，并因此成为双胞胎， 它们必须独获得它， 而不是从一个共同祖先那里继承它。

He who will read my memoir on these plants will, I think, admit that all the many gradations in function and structure between simple twiners and tendril-bearers are in each case beneficial in a high degree to the species.

我认为，任何阅读我关这些植物回人都会承认， 简单孪生植物和卷须植物之间功能和结构上所有许多等级每种情况下都对物种有很大好处。