要是你被一个问题困扰了，使得你无法继续完成你的目标，问问自己是否排出了你生活中的考验和让你分心的障碍。

If you feel that you are being distracted from your goal by a problem which does not seem to go away, ask yourself what you can do to eliminate such a challenge and distraction in your life.

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人们呕吐、腹泻会把沙门氏菌排出体外，不过这一点也被它们利用了，因为这是它们感染下一个目标的绝佳途径。

And the little buggers also use our attempts to expel them with vomiting and diarrhea. Those are both excellent ways for the bugs to get to their next victims.

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引进技术以削减烧煤排出的二氧化碳，或以较清洁能源取代煤炭，二者均很昂贵，故问题是中国能在多短时间内达成上述目标。

So the question is how fast China can introduce technologies to reduce carbon emissions from coal-burning, or else replace coal with cleaner forms of energy, both of which will be expensive.

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