There's a bunch of experimental American studies.

对此美国开展了多项实验研究。

A small number of randomised experimental studies are chipping away at the causal question.

少数随机实验研究正在逐步解决因果问题。

We know from field studies and we know from experimental studies in laboratories.

我们从一些实地考察，从实验室的实验研究得知这些。

So I was involved in an experimental study...

我参与了一个试验项目。

13. the negative relationship with smoking and older age is also in accordance with results form experimental studies.

与吸烟和老年的负面关系也符合实验研究的结果。

Researchers stated that " experimental studies have reported that suppression leads to less linking from social interaction partners and to an increase in partners' blood pressure levels."

研究人员表示，“实验研究报告称，压抑情绪会导致社交互动伙伴的联系减少，并导致伙伴血压水平上升。”

At the time, the devastated 19-year-old knew only that an experimental study at nearby Ohio State University Wexner Medical School offered hope.

当时，这位悲痛欲绝的 19 岁少年只知道附近俄亥俄州立大学韦克斯纳医学院的一项实验研究带来了希望。

In the first, we have animals that display stereotyped, predictable behaviors towards their dead, and for whom much of what we understand about them comes from experimental studies.

第一大类中的动物，会对它们的死者展现出刻板、可预测的行为，且我们对这些动物的了解多半来自于实验研究。

Findings from experimental studies with children have also lent support to the idea that musical training might cause an improvement in cognitive ability.

儿童实验研究的结果也支持音乐训练可能会提高认知能力的观点。

Some experimental studies, which are considered the best type of study for establishing cause and effect, have shown decreases in blood pressure when healthy adults were given specially developed, high-flavonoid cocoa drinks or chocolate.

实验研究被认为最能有效建立因果关系，部分此类研究表明，健康成年人在服用特殊加工后的高黄酮可可饮品或巧克力后，血压会下降。

But for a variety of reasons, it's difficult to do the kinds of experimental studies in an animal like an orca, or many of these other large mammals, that might elucidate those kinds of questions.

但基于许多理由，很难针对像虎鲸或许多其他大型哺乳类动物进行实验研究，因此无法解答这类问题。

Several theoretical and experimental studies in the last few years have found the real cause of ice's slipperiness — that thin layer of liquid water on the surface, it isn't really liquid water at all.

过去几年的一些理论和实验发现了冰很滑的真正原因 —— 表面上那一层薄薄的液态水根本不是真正的液态水。

In a recent series of experimental studies that were both held in the laboratory and through naturalistic contexts, people's pain thresholds were significantly higher after laughter than in the control group.

在最近一系列在实验室和自然环境中进行的实验研究中，人们在笑后的痛阈明显高于对照组。