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Does Technology Reduce Social Isolation?

Hundreds of daily updates come from friends on Facebook and Twitter, but do people actually feel closer to each other?

每天在Facebook和Twitter上都有朋友们数以百计的更新，但实际生活中人们是否感觉彼此更亲近呢？

It turns out the size of the average American’s social circle is smaller today than 20 years ago, as measured by the number of self-reported confidants in a person’s life. Yet contrary to popular opinion, use of cellphones and the Internet is not to blame, according to a new study released Wednesday by the Pew Internet and American Life Project.

根据互联网与美国生活专案周三发布的一项最新调查，在计算过美国人日常生活中自己认为的密友知己的数量后，事实证明当代美国人社交圈子的平均人数比他们20年前要小。但是与当前流行的观点所不同的是，这并不归罪于手机的使用和网络的普及。

In fact, people who regularly use digital technologies are more social than the average American and more likely to visit parks and cafes, or volunteer for local organizations, according to the study, which was based on telephone interviews with a national sample of 2,512 adults living in the continental United States.

根据一项调查表明，事实上经常使用数字技术的人比普通的美国人更具社交性，而且也更多的游览公园，光顾咖啡馆或更多的参加当地的志愿者活动。该项调查通过电话采访了美国本土大陆的2512名成年人。

The study found some less-than-social behavior, however. People who use social networks like Facebook or Linkedin are 30 percent less likely to know their neighbors and 26 percent less likely to provide them companionship.

这项调查也发现了一些不太符合社交性的习惯的行为，那就是，经常使用社交网站Facebook和Linkedin的人不太喜欢去认识他们的邻居，有26%的不喜欢和邻居交往。

The circle of close friends for mobile phone users tends to be 12 percent larger than for nonusers. People who share online photos or instant messages have 9 percent larger social circles than nonusers.

经常使用手机的人，他们的好朋友圈子比不使用手机者常常要多12%，在网上分享自己的照片和及时信息的人，他们的好朋友圈子比不使用者常常要多9%.

The study also found that people still prefer face-to-face communication as the primary means to stay in touch with friends and family (people see loved ones in person an average of 210 days a year). Respondents said that they were in touch via mobile phone an average of 195 days a year.

这项调查也发现人们更喜欢面对面的沟通，这是他们和好友和家庭成员保持联系的最重要的方式(人们一年中有210天会亲自看自己的亲人)。被调查者说他们一年中平均有195天通过手机和他们联系。

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以下内容选自一本科普读物。

I. 既然血液是红色的，为什么静脉是蓝色的呢？

事实上，静脉并非蓝色的，而是更接近淡**。尽管在人体外的血液看起来是红的，但在皮肤浅表的静脉里，它更接近紫色，但又略显暗红。在皮肤深层，这些充血的静脉反射出的红色光线稍逊于周边的皮肤，反衬之下就呈蓝色了。

II. 哪个工作更忙，心脏还是大脑？

这要看你是忙于思考还是忙于运动。在运动时，心脏的工作强度足足是大脑的三倍，在人的一生中传输的血液足以装满一个超级油箱。但是，从长期来看，大脑很可能更忙，因为即使人坐着不动，大脑消耗的能量仍然是心脏消耗的两倍，因此它也需要四到五倍的血液来供应。

大雁是如何飞过喜马拉雅山的?

大雁是如何飞过喜马拉雅山的?到底能否飞过去， 我们先不论，我们先假设一下,大雁要想飞越过去的前提条件和目的，进行一次推理：

1.首先考虑的是喜马拉雅山是世界最高山脉，海拔高度接近9000米了，峰顶空气稀薄，气压非常另人窒息的，登山队员之所以能登顶，是因为穿着国际标准的登山服，配备氧气瓶，确保他们的生命安全，对吧。而大雁呢，它们飞的时候，身体抗压是有极限的，当感觉呼吸困难的时候，就不会继续飞了，至少要在一个适宜的空间高飞，是吧。再好比说，航天飞机为什么能飞出地球，而里面的宇航员也能很好的在太空中生活呢，还不是供氧设备完好，身体保护设施也很先进的缘故吗？将大雁和人都装飞机里飞这么高的山脉，当然没事了，但你这题目是，大雁怎么飞的，安这样的推理，还没等飞到那么个高度，大雁已经因氧气不够，气压太大，业已身亡了。

2.人们通常看到大雁飞的高度是通过肉眼看到的，而人的视觉能见最大极限也是有的，但也绝对不是9000米吧，那不成千里眼了，也就几百米，视力好的，就千米了。因此凭借生活常识，也能推断，大雁飞的高度也就是千米左右。至少要在人的视野范围内的。

3.大雁是出色的空中旅行家。每当秋冬季节，它们就从老家西伯利亚一带，成群结队、浩浩荡荡地飞到我国的南方过冬。第二年春天，它们经过长途旅行，回到西伯利亚产蛋繁殖。大雁的飞行速度很快，每小时能飞68～90公里，几千公里的漫长旅途得飞上一两个月。

漫长的旅途，当然它们要选择最舒服的高度最充足的空间去滑翔于蓝天了，飞的越高，气压越影响它们的飞翔，也越耗费力气，自然也不会飞到9000米那个极限的高度了。

4.飞山脉作什么？山脉那头有什么？山脉上都是积雪，无比寒冷，达到南飞的目的了吗，南飞是过冬，不是集体自杀吧，还有，一个物种的繁衍是几千年的结果，大雁也不例外的，或许当初大雁刚诞生的时候，它们的祖先或许能想飞到山脉那头，但不断的被冻死，不断的有死去的，自然，就形成了固定的生活范围了，我国的南方来过漫长的冬天，所以是随时间形成的！

5.由此可见，想飞的条件和目的都不成立，当然大雁是飞不过去的，即使飞，也是楼上说的，山谷，但还是要死掉的，所以，楼主问的，不会发生的。

How do wild geese flow over the Himalayan mountains?

Let's put aside the question of whether they can make their way through,and let us make an assumption of

the preconditions and their objectives and then proceed to make a rationale.

1. First, considering that the Himalayan mountain being the highest mountain range in the world, with heights close to 9000 ft above sea level, the air at the peak is thin and atmospheric pressure suffocates someone to death if he is devoid of aids.

Why mountain climbing teams can reach the peak without endangering their lives is because they wear climbing

suits of international standards,and are equipped with oxygen tanks.

2. How about the wild geese? When they fly,their body resistance to air pressure has a certain limit. When they feel that they have problem breathing, they will not

continue to fly at least not at at a height unsuitable for their biological functioning.This reasoning is much the same to explain why spacecrafts can fly out of our planet and the spacemen can live in space,which much of it is attributed to the oxygen supply support and human body

protection facility.

3. When wild geese and humans are put on a air plane,

flying at such a height is definitely not a problem.

However,your topic is how do the geese fly.According to logical reasoning,geese will suffocate to death before

reaching this height.

4. Wild geese are usually sighted with our naked eyes, and our vision has a limit as to how far we can see.

Nevertheless, this vision limit cannot exceed 9000 ft.

Otherwise,we will all become clairvoyants.At the very most, our vision is good up to a few hundred feet or a few thousand feet. Therefore, based on our logical reasoning,

we can deduce that wild geese fly at a height of about a thousand feet.At least, their flying height has to remain

in our vision limits.

5. Wild geese are outstanding air travellers. During autumn and winter times,they will fly from their native habitat in the Siberian region in groups and mightily

to the south of China,part of natural winterly migration patterns for wide life.In the spring season of the second

year, they will return in a long journey to Siberia for eggs laying and breeding.Wild geese fly really fast rating at 68 to 90 km/h. Even at this speed,flying to destination

of a few thousand kilometers away will take them one to two months.

6.In such a long journey, they definitely have to choose a flying height where they are comfortable with and in a blue

space with openness that allows them to fly and glide.The higher they fly,the higher the influence of air pressure.

This resultantly affects their volitation capability resulting in a heavier use of their strength and energy and naturally they will not be able to attain a flying

height of 9000 ft which is also their maximum flying limit.

7.Why do they want to fly over a mountain range? What are on the other side of the mountain range? Mountain ranges

are capped with snow and are extremely cold.Have they achieved their objective of flying south? Isn't flying south to pass their winter time a mass suicide? On top of that, the multiplication of a living specie is an outcome realized from a period of a few thousand years,and wild geese is no exception.