即便是那些精心设计、对这些变量已作调整的观察性研究也只能发现其中的相关性，而无法证实一种因果关系。
Even carefully constructed observational studies that correct for such variables can only find correlations, not prove a cause-and-effect relationship.
即便审计师仅仅为客户提供税收建议或内部控制的评议(这些是美国法律允许的)的话，也足以让一些观察家对两者的亲密关系感到不安。
For an auditor to provide its client even with tax advice or reviews of internal controls (which are both permitted under American law) involves a closeness that makes some observers nervous.
休姆说，在这些很复杂的书，我们无法真正知道什么是真正的观察，因为因果关系最终是不能被可靠地证明了我们所看到的。
Hume said in these quite complicated books that we can't really know if something is true by observation, because causality can't ultimately be proved in a reliable way by what we see.
在这些故事中，他们通过两性关系的构筑来观察社会人生，反映他们对理想女性和理想婚姻的追求。
In these stories they observed society and life, reflected their pursuit for ideal female and marriage by constructing relation of male and female.
通过对这些相互关系的仔细观察。
研究人员收集了来自四个大型前瞻性队列研究的数据，这些研究在多年中对数以千计的人们进行跟踪调查，观察各种危险因素与心脏病之间的关系。
Researchers gathered data from four large prospective cohort studies that followed thousands of people for years, looking at the relationships between various risk factors and heart disease.
结合白桦雄花形态解剖观察，研究了这些内源激素与白桦雄花发育的关系。
Combining with the morphology and anatomy, the relationship between the development of male flower on Betula and these endogenous hormones was researched.
昨天，我们观察了某些小孩子的特质，我们和神的关系也应有这些特质，就是天真无邪、信靠、单纯和不骄傲。
Yesterday we noted some childlike qualities that should be part of our relationship with God: innocence, trust, simplicity, and freedom from pride.
科学关注的是发现的事实和观察的现象之间的关系性质和与建立理论，为组织这些事实和关系；
Science has to do with discovering the facts and relationships between observable phenomena in nature and with establishing theories that serve to organize these facts and relationships;
科学关注的是发现的事实和观察的现象之间的关系性质和与建立理论，为组织这些事实和关系；
Science has to do with discovering the facts and relationships between observable phenomena in nature and with establishing theories that serve to organize these facts and relationships;
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