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But such fast trains would take a long time to put in place in the United States.
VOA: special.2011.02.11
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And this goes back to the point I tried to make last time. Yes, the computers are really fast.
也会迅速膨胀,这就回到了我上次给大家讲的那一点。
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Milton tells himself to run, and naturally he would have to run fast indeed in order to arrive at a moment in time that had already occurred before he even set out!
弥尔顿告诉自己要跑起来了，而且他也确实不得不跑的很快,从而准时到达,他刚出发时就已经存在的目的地！
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Acute pain happens fast and usually lasts a short time.
VOA: special.2009.02.10
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You're taking the air inside of the pump and you're compressing it. You're doing it so fast that there's not enough time for heat to come out of the gas that's inside the pump towards the walls of the pump.
你把空气吸进气筒里并且压缩它,你的动作很快以至于,没有足够的时间让热量,从气筒里面跑出来,传递到气筒壁上。
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That said,we're still not going anywhere fast." Despite an $8,000 tax incentive for first time home buyers, sales of existing homes have declined two months in a row.
VOA: standard.2010.03.02
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And just to review a little bit what we did last time, the kind of exercise there--so I think, is this right, I think probably went a little fast last time.
先稍微复习一下上节课的内容,就是上节课中的练习,我认为,可能吧,我认为上节课讲得太快了
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A clock tells you what time it is, but you can also say what time it is by seeing how fast the particle is moving because you know it started with some speed.
时钟能告诉你现在的时间,但你也可以通过测量质点速度,来判断当前的时间,因为你知道它的初速度
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So your time scale it just fast enough that this is basically an adiabatic compassion.
你的时间足够快以至于,基本上是一个绝热过程。
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If there was a time to go too fast it was probably last time, because it turns out this is something that's covered well in the textbook, so it's covered in chapter six of the textbook.
如果真有哪次讲得太快,可能就是上次,因为这些内容,已经在课本上写得很清楚了,就在课本的第六章
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If you want to know how fast it's moving at a given time, if you want to know the velocity, I just take the derivative of this answer, which is 10-10t.
如果你想知道它在给定时刻的运动有多快,如果你想知道它的速度,我只要对这个式子求导,得到10-10t
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