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And the answer is--And why would-- why are there so few people afraid of guns, cars, and electrical outlets?
答案是，为什么我们会-,为什么害怕枪，车和电器的人很少？
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Another big one is course six which is Computer Science and Electrical Engineering.
另一个比较重要的专业是课程6，也就是计算机科学和电气工程。
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I mentioned previously that we do not know a lot about how the mechanical stimulation is being converted into chemical and electrical energy.
先前我曾说过,对于机械刺激到化学和电能的转换,我们还知之甚少。
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Here is as pacemaker and this pacemaker does the same thing that a heart pacemaker does, it generates periodic electrical signals.
它和心脏起搏器发挥的作用相似,发出周期性的电信号
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If you look at the electrical force, the force of electricity, proton and electron or something, it's not proportional to the mass of either object.
如果你考察电作用力,即电现象产生的力,质子啊,电子啊,或者其它什么东西,这种力不和物体的质量成比例
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They included a pizza chef, an electrical engineer, a bank executive, a dairy wholesaler, a school teacher and four stockbrokers; stockbrokers get the word faster.
这些人中,包括一位披萨厨师,一位电子工程师,一位银行经理,一位牛奶批发商,一位老师,和四位股票经纪人,股票经纪人散播消息的速度更快
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You bring somebody in the sleep lab, you put electrodes on their scalp and you see what these-- what sort of electrical activities you get in the brain.
把人叫来睡眠实验室，把电极贴在他们的头皮上,你就能看到-,他们有什么脑电活动。
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Now, if you're an engineer, and you use the ideal gas law to design a chemical plant or a boiler or an electrical plant, you know, a steam plant, you're going to be in big trouble.
比如说锅炉，蒸汽机,我们会遇到一个大问题：,我们设计的机器将无法运作，因为对大部分实际气体。
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so it was closely related where I built my Electrical Engineering as an undergrad and then went forward
我后来攻读的专业也和本科学的电气工程息息相关，
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I studied electrical engineering and computer science, graduated in 1986 from Princeton.
我的专业是电子工程,及计算机科学，1986年从普林斯顿大学毕业。
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This is visualizing the process of the conversion of mechanical energy into chemical and electrical energy very nicely.
这一模拟恰到好处地演示了,机械能到化学能和电能的转换过程。
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The flow of information is really a flow of electrical potential and it goes in one direction only.
信息流实际上就是电势差的流动,并且流动是单向性的
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Rather than by forming an image or a picture you put electrodes on the surface of the body and measure the electrical potential as a function of position on the body.
它并不对人进行直接的造影,而是将电极放到身体表面,通过测量该位置电势能,表征该部位的生理状态
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If you put the electrodes in the right position and you measure in the right way you can detect the electrical activity of the heart and record it on a strip recorder like this one shown here, or display it on a computer.
如果将电极放置正确,并采用正确的方式检测,就能检测到心脏的电活动,并将它记录在像这样的长图记录仪上,或者显示在电脑上
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It would generate an electrical signal because it would - you'd open the ion channel and you would ion fluxes and you would change the membrane potential in just the way I described for the action potential.
它会产生一个电信号,因为--,离子通道会打开,产生离子流,膜电位会改变,像我讲动作电位时那样
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As time goes on, we've developed ever more complex machines to study people and we've talked about some of these already: EKG machines, so an example of an electrical device that can be used to monitor a very elaborate function deep inside your body, the beating of your heart and the rhythm of your heart.
如今,我们已经有功能更加复杂的设备,来研究人类,比如之前说到的心电图,我们使用电子装置,对身体内部机能进行精确地监控,具体到心电图就是心跳和心率
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Because there are ions moving back and forth, there's a current that flows and there's a electrical potential that's generated.
由于离子的进进出出,就产生了电流流动,并且形成了电势差
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