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An understanding of the complex chain of neurotransmitters, “second messengers,” transcription factors, genes and other miscellaneous molecules needed to make a long-term memory is leading to drugs that may ultimately help more than those beset with Alzhe
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了解参与长期记忆的复杂过程，包括神经传递物、「二级传讯分子」、转录因子、基因与其他五花八门的分子，最后引导我们研发的新药物，不只有助于受到阿兹海默症或其他失智症问题困扰的年迈患者而已。 |
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An understudy who filled in at the last minute.
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在最后一分钟才临时替补的演员 |
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An undertaking, especially one of some scope, complication, and risk.
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事业一项事业，尤其指一项雄心勃勃、复杂、且具危险性的事业 |
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An underwater robot that can hear the calls of whales, and so help ships to avoid them, has just been successfully trialled in the Bahamas.
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一种水下机器人可以“听”到鲸鱼的叫声，因此可以帮助船只避免撞到它们。已经刚刚成功在巴哈马试验成功。 |
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An undeserved success is like a medal that is found lying in the street.
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有名无实的功绩,就象在街上拾到的奖章. |
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An undistinguished face in the crowd.
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在人群中未注意到的面孔 |
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An undoing of a pattern that has been relatively dominant throughout this lifetime .
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化解某个一直在支配著你这辈子的模式。 |
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An unerring faculty for detecting hypocrisy is one of her most useful attributes.
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能无误地看出伪善的能力是她身上最有用的特征之一。 |
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An unexpected encounter with a winter lizard.
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与冬天蜥蜴的一次意想不到的遭遇。 |
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An unexpected error occurred!
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发生意外的错误！ |
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An unexpected invitation to reconstruct the first president as he looked in his younger years—before the famous portraits and statue—sent me on a hunt that revealed a very different Washington from the unapproachable, thin-lipped elder statesman on the do
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我意外的受到邀请，要重建美国第一位总统年轻时的模样，而且比起他著名的肖像与雕像的年纪要早许多。 |
