A: the autonomic nervous system USES the hormone adrenaline, a neurotransmitter, or chemical messenger, to send signals to various parts of the body to activate the fight-or-flight response.

答：这套自动神经系统利用肾上腺激素(一种神经递质，或者称为化学信使)把信号发送到身体的各个部分，以便激活“斗争还是逃避”反应。

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It breathes and takes wing, becoming a messenger in one or more of our innumerable transactions with the world and with each other.

它呼吸并翱翔着，或多或少的成为了我们人与世界和人与人之间不计其数交流联络的信使。

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The autonomic nervous system USES the hormone adrenaline, a neurotransmitter, or chemical messenger, to send signals to various parts of the body to activate the fight-or-flight response.

自身的神经系统利用肾上腺素，一种神经传递介质或者说是化学信使，把信号传递在身体的各个部位以刺激“战或逃反映”。

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It's called cDNA or complimentary DNA to indicate that it's a copy, a complimentary copy of the messenger RNA.

它叫cDNA或者互补DNA,意味着它是一个拷贝,一个信使RNA反转录得出的DNA拷贝

耶鲁公开课 - 生物医学工程探索课程节选

Well, that anti-sense strand is shown here as the red and the cell is naturally making the blue or sense strand of messenger RNA for a particular protein.

好的,反义链在这里以红色表示,细胞自身会造出合成某种,特定的蛋白质的蓝色RNA正义链

耶鲁公开课 - 生物医学工程探索课程节选

When you think about a gene or a transcript, the messenger RNA copy of a gene, you know that for every sequence of a nucleic acid there's a complimentary sequence.

当你们考虑一段基因或者一个,转录一段基因的mRNA拷贝,你们知道每个核酸序列,都有互补序列

耶鲁公开课 - 生物医学工程探索课程节选

It found that, even in the wake of the summer riots, as many as a third of people who regularly use services such as Facebook, Twitter or BlackBerry Messenger appeared not to realise that posting a message openly organising a looting spree is illegal.

FORBES: Shocking News: Illegal Things Are Illegal Even on Facebook

The whole thing is supported by a carabiner laced through a loop in the top of the skinny bottle, so the sanitizer can be suspended from a backpack, messenger bag or other carrying case for easy access to its cleansing contents.

ENGADGET

Perhaps Facebook will start showing ads on top of its mobile messenger app or do so on a free version of the app and offer a premium version for a modest price that does not include advertising.

FORBES: Blackberry, Yahoo, Apple, Google and Now FaceBook to Pressure Carrier Texting Revenue