covariation

n.

共变；协变；

1. The covariation of language and society is a fundamental concept in the covariation theory of sociolinguistics.
   语言和社会的共变是社会语言学共变论的一个基本观点。

From Covariation to Causation
From covariation to causation: A causal power theory.
From covariation to causation: a test of the assumption of causal power
GENETIC COVARIATION AMONG LIFE‐HISTORY COMPONENTS: THE EFFECT OF NOVEL ENVIRONMENTS
Covariation between Life History and Sexually Selected Traits: An Example with Cardueline Finches
Terrestrial gross carbon dioxide uptake: global distribution and covariation with climate
Brain potentials in affective picture processing: covariation with autonomic arousal and affective report.
Econometric Analysis of Realized Covariation: High Frequency Based Covariance, Regression, and Correlation in Financial Economics
A comparison of phenotypic variation and covariation patterns and the role of phylogeny, ecology, and ontogeny during cranial evolut...
From the Cover: Convergent adaptive radiations in Madagascan and Asian ranid frogs reveal covariation between larval and adult traits