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And that means that it's vulnerable to certain kinds of mistakes that can happen,
这意味着这种网络易受到某种可能发生的某种错误的干扰，
or certain kinds of deliberate attacks, but even the mistakes can be bad.
以及受某种蓄意的攻击，但是即使是错误，也会很麻烦。
So, for instance, in all of Asia recently, it was impossible to get YouTube for a little while because Pakistan made some mistakes in how it was censoring YouTube in its internet work.
例如，最近在亚洲的所有地区，有一小段时间不能访问YouTube是因为巴基斯坦在其内部网络审查YouTube的方法上犯了一些错误。
They didn't intend to screw up Asia, but they did because of the way that the protocols work.
他们无意于在亚洲墙掉Youtube，但由于的协议工作方式，他们确实短时间内阻断了Youtube。
Another example that may have affected many of you in this audience is,
另一个可能会影响很多在座听众的例子是，
you may remember a couple of years ago, all the planes west of the Mississippi were grounded because a single routing card in Salt Lake City had a bug in it.
你可能还记得在数年前，密西西比州西部的所有飞机停航了，是因为盐湖城的一个路由卡出现了问题。
Now, you don't really think that our airplane system depends on the Internet, and in some sense it doesn't.
你当然不会认为飞机系统依赖于因特网，在某种意义上它确实不依靠因特网。
I'll come back to that later.
稍后我会再谈到这一点。
But the fact is that people couldn't take off because something was going wrong on the Internet, and the router card was down.
事实是人们不能起飞，是因为互联网出了某种问题，路由卡宕机了。
that means
这意味着
1.That means so much to me.
那对我太重要了。
2.I think it's pretty clear what that means to you
我想这对你来说意味着什么已经很明显了
3.I know you don't know I know what that means
我知道你不知道我知道那意味着什么
it is impossible to
不能
1.It is impossible to say how delicious it is.
很难说它是多么的美味。
2.it is impossible to be sure who is the murderer.
我们无法确定谁是凶手。
3.It is impossible to get help, so she has to become a tough girl
因为不能得到帮助，所以她必须变成一个女汉子。
screw up
拧紧;扭歪（脸）;<非正>把…搞糟
1.I hope I don't screw up this time.
我希望这次不会搞砸了。
2.if I screw up again, I will punish myself
如果我再搞砸，我会惩罚自己。
3.I think I screwed up yesterday's interview
我想我把昨天的面试搞砸了。
in some sense
在某种意义上
1.in some sense, she is my girlfriend.
从某种意义上说，她是我的女朋友
2.In some sense it is ， but the success is does not have the shortcut, you pay how many to have how many the repayment.
从某种意义上说确实是，但成功是没有捷径的，你付出多少有多少回报。
3.in some sense , we can get eternal life
从某种意义上说，我们可以得到永生。
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