One of Barack Obama's first acts as president was lifting the U.S. restrictions on medical research using embryonic stem cells.

巴拉克·奥巴马宣誓就职后施行的第一批政策中，加强对胚胎干细胞医疗研究的限制赫然在列。

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One ofBarack Obama's first acts as president was lifting the U.S. restrictions onmedical research using embryonic stem cells.

奥巴马上任伊始，就提高了美国对使用胚胎干细胞进行医学研究的限制。

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When the head begins to heat up, yawning acts as a natural "thermostat" by allowing cool air to rush in and bring the brain back down to a healthy temperature, research suggests.

科学家研究发现，当人的大脑开始出现过热时，打呵欠的动作就充当天然的“自动调温器”，让清凉的空气进入大脑，使大脑温度恢复到健康水平。

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But the vice president said the studies had not made "the next connection" - that game playing actually led to violent acts - and concluded that more research was needed.

BBC: EA boss denies video games encourage violent attacks

That strikes me as disingenuous, since the media relations department acts upon information provided by the departments conducting the research.

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But IV soon morphed into a multipronged, first-of-its-kind firm: It buys and licenses patents, sues infringers, acts as a venture capitalist for inventors and does in-house scientific research.

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