Glass cautions that most studies don't necessarily prove a causal link between greenness and health, but they're nonetheless helping spur action.
格拉斯提醒说，大多数研究并不一定能证明绿色与健康之间的因果关系，但它们仍然有助于激励人们采取行动。
Unfortunately, in many studies published today, researchers forget this fundamental limitation of their research and suggest their data can actually demonstrate or "suggest" causal relationships.
不幸的是，目前已发表的许多研究中，研究者常常忽略了这一点，并表示他们的数据可以论证或者推倒出因果关系。
The human studies all are observational, showing only an association between cellphone use and cancer, not a causal relationship.
在人类身上做的研究都是观测性的。结果表明，使用手机与癌症有一定联系，但不是因果关系。
Both studies are not trials, which means that a causal relationship between eating Fried fish and increased risk of stroke has not been established.
这两种研究观点的争论还没有最终的结果，这意味着，吃油炸鱼和增加患中风的几率是否存在因果关系尚未确定。
Extensive studies and data analysis of influenza vaccines have only found a well established causal association with the 1976 vaccine that contained an H1N1 swine-influenza-like virus.
经由对流感病毒的进一步研究和数据分析，只发现在1976年含有类似于H1N1病毒的疫苗存在一例具有完整因果联系的案例。
To date, results of epidemiological studies provide no consistent evidence of a causal relationship between radiofrequency exposure and any adverse health effect.
迄今为止，流行病学研究结果并未提出任何相互一致或有说服力的证据，证明接触射频与任何不良健康后果存在着因果关系。
To demonstrate the causal role of language, what's needed are studies that directly manipulate language and look for effects in cognition.
为了表达语言的因果作用，所需要的研究是对于语言的直接操纵，查看认识效果。
Several previous studies have not found any associations between CRP gene variants and cardiovascular risk, leading to conclusions that CRP may not play a causal role in heart disease.
以前的一些研究没有发现CRP基因变异体与心血管危险因素的关系，以致得出CRP可能不是心脏病的原因的结论。
He says more studies are needed to confirm the findings and to determine whether oral health and cardiovascular disease are causal or simply risk markers.
他说要证实并确认口腔卫生是心脏病发生的原因还是只是一个危险因素，还需要更多的研究。
Most importantly, observational studies cannot distinguish indicators of risk from causal factors.
最为重要的是观察性研究无法区分风险指标和偶然因素。
A good deal of research has been devoted to the study of foreign language anxiety in recent years. Yet very few studies have referred to culture as a causal factor in foreign language anxiety.
近年来有大量致力于外语语言焦虑的研究出现，但是将“受文化因素影响的外语语言焦虑”作为研究重点的却不多见。
Experimental studies in laboratory animals, however, have challenged this belief by indicating support for a causal role of uric acid in hypertension.
但是在实验动物中的试验研究对这种看法提出了挑战，表明尿酸是发生高血压的原因。
Experimental studies in laboratory animals, however, have challenged this belief by indicating support for a causal role of uric acid in hypertension.
但是在实验动物中的试验研究对这种看法提出了挑战，表明尿酸是发生高血压的原因。
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