他也研究过该课题。

He, too, has researched the topic.

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戈登也研究过肠道微生物在防治疾病中能够发挥何种作用的问题。

Gordon has also looked at the role microbes in the gut play in combating diseases.

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科学家们也研究过一种叫做原蜥脚类的体态为中型的恐龙，它们与蜥脚类恐龙亲缘很近。

Scientists also knew about a related group called prosauropods, dinosaurs that were intermediate in size and posture.

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He did this jointly with the Chairman of the Economics Department here, Chris Udry and he has spent time in India looking at the village economies.

这是他和耶鲁经济学院院长,克里斯·尤迪合作完成的,他也曾在印度做过农村经济的研究

耶鲁公开课 - 金融市场课程节选

So you know, I've done , like, research here.

所以，我也参加过研究。

我遇到的天才们 - SpeakingMax英语口语达人

It expands. You change your constraints on your system, you heat it up some more, then you take the heat source away, and you put it back in contact with the atmosphere. And you cool it a little bit, change the constraints, cool it a little bit more, and heat, and you've got a closed cycle engine.

让它与大气接触冷却,改变约束，使它继续冷却，然后又再次加热,这就是循环热机，我们以前也研究过，更复杂的机器。

麻省理工公开课 - 热力学与动力学课程节选