| 单词 | natural selection |
| 释义 | natural selection noun[U] uk/ˌnætʃ.ər.əl sɪˈlek.ʃən/us/ˌnætʃ.ɚ.əl sɪˈlek.ʃən/theprocessthatresultsin thecontinuedexistenceof only thetypesofanimalsandplantsthat arebestabletoproduceyoungor newplantsin theconditionsin which theylive （物种的）自然选择，物竞天择Compare survival of the fittest Animal reproduction
natural selection| American Dictionarynatural selection noun[U] us/ˈnætʃ·ər·əl siˈlek·ʃən/biology thetheorythatorganismswithcharacteristicsthatallowthem tolivesuccessfullyin aparticularenvironmentwillreproduceorganismswith the samecharacteristics Examplesofnatural selectionnatural selection Naturalselectionfavoured those who produced over those who wasted resources. From theCambridge English Corpus Our remarkable mental capacity has taken us out of the sphere of influence ofnaturalselectionwhich has hitherto ensured man's survival. From theCambridge English Corpus In addition tonaturalselection, there are other mechanisms that could be implicit in a given functional explanation. From theCambridge English Corpus This paper sets up a model ofnaturalselectionamong body types to explain this pattern. From theCambridge English Corpus In other words,naturalselectionwill, in a stable environment, result in the optimal allocation of resources. From theCambridge English Corpus Why the selection of resistance to anthropogenic toxins normally involves major gene changes : the limits ofnaturalselection. From theCambridge English Corpus In laboratory selection experiments, the force ofnaturalselectionin later ages can be experimentally varied in a more controlled fashion. From theCambridge English Corpus The effect ofnaturalselectionwould be reinforced if asexual reproduction was predominant in the population. From theCambridge English Corpus And yet elsewhere, in a video that simply and quickly explains the workings ofnaturalselection, viewers see the "theory" in operation. From theCambridge English Corpus He takes an ecosystem approach, passing lightly over how so many kinds of trees can coexist, and hownaturalselectionon individuals shapes tropical forest. From theCambridge English Corpus Nevertheless, it is unclear how the left-brain lateralization for vocalization alone, withoutnaturalselectionfor hand or arm specialization, would lead to the actual right-handedness. From theCambridge English Corpus These definitions reveal underlying properties and, thereby, they support thenaturalselectionhypothesis. From theCambridge English Corpus According to evolutionary theory, some effects of a mechanism were beneficial to past organisms and thereby caused thenaturalselectionof the mechanism. From theCambridge English Corpus Conversely, morphological traits are generally believed to be subject tonaturalselection, and their expression is partially under the influence of environmental factors. From theCambridge English Corpus Thus,naturalselectionfavours smaller, more rapidly maturing worms when the resulting increase in survival outweighs size-related reductions in fecundity. From theCambridge English Corpus These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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