发生的

The theory of orthogenetic evolution suggests that species evolve in a predetermined direction.
正向进化理论认为物种会朝着预设的方向进化。
Orthogenetic concepts were once popular but have since been largely discredited by evolutionary biologists.
正向进化的概念曾经很流行，但后来被进化生物学家们广泛质疑并失去信用。
Lamarck's ideas on the inheritance of acquired characteristics can be seen as a form of orthogenetic thinking.
拉马克关于获得性状遗传的观点可以看作是一种正向进化的思考方式。
The idea that evolution follows an orthogenetic path is not supported by empirical evidence.
进化遵循正向路径的想法并没有得到实证证据的支持。
The concept of orthogenesis implies a teleological view of evolution, which is at odds with Darwinian theory.
正向进化的概念暗示了一种目的论的进化观点，这与达尔文理论相冲突。
Orthogenetic evolution was often invoked to explain the development of complex structures like eyes or wings.
正向进化常被用来解释像眼睛或翅膀这样复杂结构的发展。
The term 'orthogenetic' refers to a mode of evolution characterized by a unidirectional trend.
"正向的"这个术语指的是以单一方向趋势为特征的一种进化模式。
Some early 20th century biologists believed in orthogenetic evolution, but this idea has been largely abandoned today.
一些20世纪初的生物学家相信正向进化，但这种观点在今天已被广泛放弃。
The idea that evolution proceeds along fixed, predetermined paths is a central tenet of orthogenetic theory.
进化沿着固定的、预设的路径进行的想法是正向进化理论的核心原则。
Despite its initial popularity, the orthogenetic model of evolution has failed to withstand scientific scrutiny.
尽管它最初很受欢迎，但正向进化的模型并未经受住科学检验。