In infants, the level of glucocorticoid-receptor methylation is correlated with the release, in response to stress, of higher-than-normal amounts of stress hormones.
婴幼儿（时期）糖皮质激素受体的甲基化程度与人体遇到压力时会分泌出高于常态的压力激素相关.
1. in response to stress是一句插入语,对release作出解释,指出分泌的原因是因为受到压力的反应.
2. 相关与有关有细微的区别.这里的相关表示两者之间有互动关系.

供参考~