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which mean "help me." Frederick Stanley Mockford created the mayday call signal in the nineteen twenties.
VOA: special.2010.04.18
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This is a signal - this passing of phosphorous - is a signal that's used very frequently in intracellular communication.
这是一种信号,一种通过磷酸来传递的信号,这种信号在细胞内通讯时经常被用到
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What happens is a negative symptoms are alleviated, and we start to resurrect the signal in this part of the brain.
结果阴性症状得到了缓解，而大脑中这一部分区域的信号,也开始得到恢复。
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In most places in the world, a green light is a signal to move ahead.
VOA: special.2010.05.23
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This densely tangled thicket of clustered consonants in this amazing couplet is a signal to us of the weight, of the import, of this terrible event.
这个密集杂乱的灌木丛,在这个对句中，弥尔顿给我们传递出一个信号，在这个可怕的事件中。
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Although this was an animal study, the scientist behind it thinks it could signal new ways of treating cancer in people.
VOA: standard.2010.07.14
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The signal comes in the form of molecules which we're going to call throughout the lecture here 'ligands'.
信号通常以分子的形式来传递,在这门课里我们把这种分子叫做配体
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"This is a signal to the United States by the rest of the world that we did something very right in the election of Barack,"
VOA: standard.2009.12.10
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Most frequently, chord changes come on the downbeat so composers signal to us in a fourth way the downbeat by means of chord change.
通常,和弦的变化都在重拍上,所以作曲家们用这第四种途径,通过和弦的变化告诉我们重拍的位置
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Republican Representative Dan Burton said Congress should send a signal in every piece of legislation it approves that Tehran's ballistic missile and nuclear aspirations are unacceptable.
VOA: standard.2009.05.20
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What happened in that case is he has learned that the raising of a hand is a signal that he is about to be hit and so he responds to that signal.
在这个例子中，他知道,举起的手臂是他即将挨打的信号,因此他对这个信号作出了反应。
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A more intriguing possibility is that our genetic makeup includes a signal encoded by aliens in our DNA that might have been left hundreds of millions of years ago.
VOA: standard.2010.04.16
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This is commonly used in the immune system as well, but it's a way of amplifying a signal.
免疫系统也常使用这种方法,但这主要是一种放大信号的方式
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The industrial unrest for higher pay in China poses two major questions: Does it signal the start of new era of industrial unrest and the rise of militant unionism?
VOA: standard.2010.06.24
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And,you may or may not be intested in the motion, as I am, but you might say: what is the signal good for?
对于情感来说，你们或许有兴趣，也有可能和我一样觉得没意思，但你会问，这种信号什么用处？
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The alleged use of special operations troops in the raid could signal a shift away from the controversial U.S.tactic of relying on long-range missile assaults to take out terrorist targets.
VOA: standard.2009.09.15
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In the case of a ligand-receptor, a chemical signal in the form of a concentration of ligand gets converted into a biochemical signal.
在配体-受体系统中,配体浓度这种化学信号,转化为生化信号
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Muhammad Salim Akhtar of the American Muslim Task Force on Civil Rights and Elections says Obama administration support for the opposition would send a signal that the United States favors full democracy in Pakistan.
VOA: standard.2009.03.11
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It sends it's signal, it's signal - the signal that it sends is this change in voltage, and once it changes, maybe it's all done.
它发出信号,它通过电压的改变发出信号,然而一旦电压改变,细胞的使命到此就终结了
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I think now would be a particularly bad time to send a signal to the international community and to our overall financial system by playing politics in any way with this upcoming vote,".
VOA: standard.2010.01.24
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So range or position here in the accompaniment can oftentimes signal this information to us.
因此伴奏的音域或者音高,常常告诉我们这个信息
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Families of those suspected to have been killed in the mid 1980s by agents of the right-wing military regime of Oscar Mejia Victores, say just being able to search for their loved ones is a signal of progress in this country.
VOA: standard.2009.12.18
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When they receive the signal they make - they change in a very specific way and the cell can recognize this change that's occurred at the cell surface.
当它们接收到信号之后,就会发生十分特殊的变化,细胞能够识别自身表面发生的这种变化
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"They have not got their acts together. So I think the Swat operation has sent a very strong signal and if the government now starts an operation in even Waziristan, which is considered as a hard nut, I think it has good chances to succeed."
VOA: standard.2009.09.14
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If you hear about signal transduction in biology, people that study signal transduction are studying just these things we talked about, how biochemical messages get transferred into cells and through cells.
如果你在生物学领域听到信号转导这个词,那么研究信号转导的人就是,在研究我刚才讲过的那些东西,生化信息如何传入细胞并传递至细胞各处
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I know where your mom is. I know where your brother is buried. When people come up and say we know where so and so is it's a signal to us that the reconciliation, the coming together of Hutu, Tutsi kind of business is really in progress and we are really happy with it,".
VOA: standard.2009.04.10
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Now, in this cartoon here I've shown a variety of different receptors just to show just to remind you of the different families of receptor molecules that could be involved in receiving and translating a signal.
这个动画中,我向你们展示了各式各样的受体,为了让你们记住不同族的受体分子,它们都涉及信号的接受和翻译过程
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"One of the jobs of the president, whether you are named Bush or Obama, is to go out there and reassure people and to show you are in charge and to send a signal to potential enemies out there that this will not be tolerated by any American leader, and they did not project that power effectively,".
VOA: standard.2010.01.06
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This is a mechanism by which an electrical signal comes here, it gets translated into a chemical signal, the chemical diffuses across the gap and reinitiates a - an electrical signal in the next cell and that's one way that it happens.
这就是电信号产生的机理,电信号翻译成化学信号,化学物质扩散过突触间隙,重新激起下个细胞中的电信号,这是一种方式
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Here's where the intelligence of the immune system comes in, is that these cytotoxic T-cells that are generated only kill cells that have this signal on it.
免疫系统的聪明之处就在此,这些细胞毒T细胞,只能杀死具有特殊标记信号的细胞
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