【Passage 1 】
If you are about to quit your job and start your own company, then maybe you should reconsider.
Starting a new company can be very risky and isn't as easy as many people imagine.
In fact, many new businesses fail within a few years, or they barely survive.
So think carefully before you risk everything and invest your money in a dream that may turn out to be a nightmare!
译文：如果你打算辞职开自己的公司，也许你应该重新考虑一下。开办一家新公司是非常冒险的，不像许多人想象的那么容易。事实上，许多新企业在几年之内就倒闭了，或者根本无法生存。所以，在你冒着一切风险把钱投入一个可能会变成噩梦的梦想之前，请仔细考虑一下！
Language points:
be about to do sth. = 正打算，即将
start a company = 开一家公司
reconsider = 重新考虑
reconsider doing sth. = 重新考虑做某事
如，reconsider doing business（重新考虑做生意）
risky = 冒险的，有风险的
risk everything = 冒着一切风险，不惜一切代价
【 Passage 2 】
Another important factor is how the wealth of a country is shared.
In some countries much of the wealth is concentrated in just a few people.
For example, in the US, just 5% of the population holds more than 70% of the wealth.
This shows that many US citizens are not wealthy despite the size of their economy.
译文：另一个重要因素是一个国家的财富如何分配。在一些国家，大部分财富集中在少数人手里。例如，在美国，只有5%的人口拥有超过70%的财富。这表明，尽管美国经济规模庞大，但许多美国公民并不富裕。
【 Passage 3 】
Some people think that rules don't apply to them.
They think they shouldn't be treated like anybody else.
You can usually see this in their appearance and by how they work with others.
Such people are often very competitive and hate to be criticized.
Unfortunately, they may have exceptional skills, so you have no choice but to work with them.
译文：有些人认为规则不适用于他们。他们认为他们应该区别对待。你通常可以从他们的外表以及他们与别人的合作中看出这一点。这样的人往往很好胜，不喜欢被批评。不幸的是，他们可能有特殊的技能，所以你别无选择，只能和他们一起工作。
【 Passage 4 】
Some people worry about the effects of a magnetic field reversal.
They think there is a possibility that it could cause many problems.
For example, without a magnetic field, communications could be disrupted.
Birds and other forms of life could become confused and get lost.
译文：有些人担心磁场逆转的影响。他们认为这可能会引起许多问题。例如，没有磁场，通讯就会中断。鸟类和其他形式的生命可能会搞混而迷路。
【 Passage 5 】
Living conditions around the world vary.
Some countries have very large economies, but the majority of their citizens are poor.
Other countries have smaller economies, but the majority of their citizens are NOT poor.
So the size of a country's economy isn't the only factor that determines how wealthy its citizens are.
译文：世界各地的生活条件各不相同。有些国家的经济规模非常大，但大多数公民都很贫穷。其他国家的经济规模较小，但大多数公民并不贫穷。因此，一个国家的经济规模并不是决定其公民富裕程度的唯一因素。
【 Passage 6 】
So the process begins by breathing in air, which happens when the lungs expand and draw in air.
Once inside the lungs, oxygen in the air is exchanged for carbon dioxide in the blood.
This exchange happens when blood cells release carbon dioxide and absorb oxygen.
译文：这个过程从呼吸空气开始，当肺部扩张并吸入空气时就会发生。一旦进入肺部，空气中的氧气就会转化为血液中的二氧化碳。这种交换发生在血细胞释放二氧化碳并吸收氧气的时候。
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