No one quite knows why glaciers and ice shelves are melting so fast, or how a meltwater lake on the Greenland ice sheet covering six square kilometres could drain away in 24 hours, as it did in 2006.
没有人非常了解为什么冰架这么迅速的融化，也没人知道格林兰冰架上的一个覆盖6平方千米的融水湖会在24小时内流干——这在2006确实发生了。
Mary: “I once tried to burn it all off because hair burns so fast, but then my mom came home and she was like, “Why does it smell like burning hair? Did you burn your hair?
我有次想把它们全烧了，因为头发着起来那么快，但是妈妈进来了，她问我：‘怎么闻起来像头发烧焦的味道？
So, in theory, its underdevelopment may explain why young people seem more willing to take risks like driving too fast.
因此，在理论上，大脑的不发达也许可以解释为什么年轻人似乎更愿意冒风险飞速驾驶了。
Mary: "I once tried to burn it all off because hair burns so fast, but then my mom came home and she was like," Why does it smell like burning hair?
Mary：“我有次想把它们全烧了，因为头发着起来那么快，但是妈妈进来了，她问我：怎么闻起来像头发烧焦的味道？”
Pío is now uprooting trees that are several centuries old. No one knows for certain why it has advanced so far and so fast over the past 80 years.
Pío XI冰川在扩展途中将有几个世纪树龄长的大树连根拔起，没有人知道为什么在过去的80年间它扩张得如此之远，如此之快。
Then imagine the difficulties of defending it against the obvious criticisms in an era before mathematically rigorous physics: why are we not flung from the Earth if it spins round so fast?
然后再想象一下在严格数学化的物理时代之前只身对抗各种显而易见的质疑的困难吧：如果地球转的这么快我们为什么没有被甩离地球？
The point is that sometimes Life moves so fast, you forget who you were or why you are with the person. A journal acts as a reminder.
关键在于，年华似水，有时候你会忘记你曾经是怎么样的，或者为何你和眼前人在一起，日记能帮助你、提醒你。
If local transactions are so fast, then why doesn't everyone use them?
既然本地事务这么快，那么为什么不是每个人都使用它呢？
So why does America lead in the fast-growing high-tech sectors, and why does Europe hold its own only in more mature industries?
那么为什么美国在快速增长的高科技领域领头，而欧洲仅守在它的更加成熟的工业中呢？
Fastfood becomes more popular now, especially among the teenagers and the children. Why do so many people like fast food?
快餐食品现在越来越流行，特别是在青少年和儿童中。为什么那么多人喜欢快餐呢？
For better or worse, parents have limited power to influence their children. That is why they should not be so fast to take all the blame - or credit - for everything that their children become.
父母对孩子的影响力是有限的，这点不知是好还是坏。
The reason why he was driving so fast was that he was going for an important meeting.
他车开得那么快的原因是，他要去参加一个重要会议。
That's why his hips unwound so fast on the downswing.
这就是为什么下挥杆的时候根可以那么快速的外展他的髋关节。
I really can't understand why so many people stick to fast food even when they are not actually in a hurry.
在一系列试验中，研究人员向参加测试者展示几家快餐连锁店的商标问他们上次去哪家吃饭。 研究人员发现这些人里琢磨着快餐的人看图速度很快，即便根本没人催促他们。
"Why are you driving so fast?" the policeman asks.
“你们为什么开得这么快？”警官问道。
Fast food becomes more popular now, especially among the teenagers and the children. Why do so many people like fast food?
快餐食品现在越来越流行，特别是在青少年和儿童中。为什么那么多人喜欢快餐呢？
THE Obama magic has waned and Washington, to a visitor, is full of people sadly theorising about why it waned so fast and whether it might be retrievable.
奥巴马的魔力减退了。在外人看来，华盛顿满是哀伤地思索着为什么这魔法会衰弱得如此快，它是否还会再重现的人们。
English is also a type of language that make you improve really fast, and you can see what you've improved in a very short time, that is also why I like the subject English so much.
英文也是一种可以让你进步很快的语言，然后在一个很短的时间内你就可以看见你的成绩，这也是为什么我那么喜欢英文。
Indeed, the only surprise about this segment growing so fast is why it has not occurred sooner.
的确，这一部分人口快速成长惟一令人惊讶的是为何它没有早点发生。
Why does it take so long to install offline I thought this was going to be mega fast like promised?
为什么需要那么长的时间安装离线我认为这将是超级快喜欢承诺吗？
If this is true, it could explain why time only moves forwards, and possibly why the universe is expanding so fast.
如果这是真的，那么就能够解释为什么时间总是向前流动，以及为什么宇宙会如此高速地膨胀。
Why are Jamaican sprinters so fast?
牙买加闪电为何能如此之快？
There were plenty of other cars around me who were going just as fast, so why did I get the ticket?
刚刚我周围还有很多车开得跟我一样快啊。为什么只有我得到罚单?。
The reason why he was driving so fast was that he was late for an important meeting.
他车开得如此快的原因是一个重要会议他要迟到了。
The reason why he was driving so fast was that he was late for an important meeting.
他车开得如此快的原因是一个重要会议他要迟到了。
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