研究人员对这些结果困惑不解，因为这与他们的预料截然相反。他们预测，和看电视相比，从社交角度来说，上网可能更健康一些因为网络允许使用者选择自己需要的信息并且和别人进行交流。
研究者推测说，实际情况是上网使网民减少了和家人及朋友共度的时光，这也许可以解释他们心理健康状况下降的原因。和面对面的交谈相比，这种见不着面、看不见人的“虚”的交流可能会使人从心理上缺乏满足感。人们通过这种交流结下的友谊也不会太深。还有一种可能是，网民通过因特网所了解到的广阔世界使他们对自己的生活不那么满意了。
“然而，重要的是不要忘记这与技术本身是无关的，问题在于如何使用因特网。”这项研究的发起人之一、心理学家、英特尔公司的克里斯廷·赖利说，“这的确表明在考虑从技术上如何设计应用和服务时有必要把社会因素考虑进去。
重点单词：
1、available 可利用的，可支配的；
例句：The swimming pool is available only in summer.
这个游泳池只在夏天开放。
2、contrary to 与……相反
例句：What you are doing now is contrary to the docotor's advice.
3、hypothesize 假设，假定；
4、virtua [电脑]虚拟的，虚的；对于这个词可以结合上下文理解，
Faceless, bodiless virtual communication may be less psychologically satisfying than actual conversation, and the relationships formed through it may be shallower.
文中virtual communication对应着后面的actual conversation，又有than，可以想到这是两个对应的反义词。
5、actual 现实的；
6、exposure to 暴露，(文中引申为了解)
例句：The paint came off as the result of exposure to the rain.油漆因受雨淋而剥落。
7、sponsor 发起者，主办者，赞助者
Is GE food Safe To Eat
Traditional plant breeding involves crossing varieties of the same species in ways they could cross naturally. For example, disease-resistant varieties of wheat have been crossed with high-yield wheat to combine these properties. This type of natural gene exchange is safe and fairly predictable.
Genetic engineering(GE)involves exchanging genes between unrelated species that cannot naturally exchange genes with each other.GE can involve the exchange of genes between vastly different species, e.g.putting scorpion toxin genes into maize or fish antifreeze genes into tomatoes. It is possible that a scorpion toxin gene, even when it is in maize DNA, will still get the organism to produce scorpion toxin, but what other effects may it have in this alien environment?We are already seeing this problem——adding human growth hormone genes to pigs certainly makes them grow——but it also gives them arthritis and makes them cross-eyed, which was entirely unpredictable.
It will be obvious, for example, that the gene for human intelligence will not have the same effect if inserted into cabbage DNA as it had in human DNA——but what side-effect would it have? In other words, is GE food safe to eat? The answer is that nobody knows because long-term tests have not been carried out.
Companies wanting a GE product approved in the UK or USA are required to provide regulatory bodies with results of their own safety tests.Monsanto''s soya beans were apparently fed to fish for 10 weeks before being approved. There was no requirement for independent testing, for long-term testing,for testing on humans or testing for specific dangers to children or allergic people.
