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And what does that mean? It means I am trained in geology, but with interests in the other planets and Mars in particular."
VOA: special.2010.07.28
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If something has a high ionization energy, it means that it really, really, really does not want to give up an electron.
如果某个东西有很高的电离能，这意味着它非常非常，非常不愿意失去一个电子。
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So, second ionization energy simply means you've already taken one electron out, now how much energy does it take for you to take a second electron out.
第二电离能简单地说就是,在你已经拿走一个电子以后，再拿走第二个电子,所需要消耗的能量。
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"There is the support of this counterinsurgency strategy, which means that ministers agree that it does not solve the problems in Afghanistan just to hunt down and kill individual terrorists,".
VOA: standard.2009.10.23
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To say that somebody does something alone means they do it not in the presence of others.
就是说人孤独而死的意思是,他们死的时候身边没有别人的存在。
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The Obama administration,he added, must make clear that it does not view engagement with Iran as a process without an end, but as a means to identify ends that would benefit both countries.
VOA: standard.2009.04.28
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It means by choosing the easy pass, he does at least as well, and sometimes better, than he would have done had he chosen the hard pass.
它意味着选择平坦之途,较选择崎岖之途而言,至少要同样的好,可能还稍微好些
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You have done it before, but when you say, "I know calculus, " Sometimes it means you know it, sometimes it means you know of some fellow who does or you met somebody who knows.
你们以前学过,但当你们说,"我懂微积分",有时这表明你们懂,有时表示你知道谁懂,或者你遇到了懂这个的人
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The one thing you want to keep in mind though is that Hertz does not actually mean inverse seconds, it means cycles per second. So, if you're talking about a car going so many meters per second, you can't say it's going meter Hertz, you have to say meters per second.
写成5每秒，或5赫兹,你们要记住的是赫兹,并不等于秒的倒数，它是每秒的循环数，如果你们说,一辆车一秒可以走多少米,你不能说它走了米赫兹。
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What does that mean? Well, it means that, you know, there's maybe, let's say, that in the next 24 hours it will break down.
这意味着什么 好的,这意味着,就是说,有可能,这个原子会在未来的二十四小时内分裂
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