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手机改变了人与人之间的关系。通常有注意到会议室的门上的告示，写着“关闭手机。”然而，会议室仍然充满着铃声。我们都是普通人，没有很多重要的事情。但是，我们也不愿轻易关闭手机。打开手机象征着我们与世界的联系。手机反映出我们的社交饥渴。我们经常看到，一个人走着走着，就突然停下来了，眼睛盯着他的手机，不管他在那里，无论是在道路中心或旁边有厕所。

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We, the human species, are confronting a planetaryemergency – a threat to the survival of our civilization that is gatheringominous and destructive potential even as we gather here. But there is hopefulnews as well: we have the ability to solve this crisis and avoid the worst –though not all – of its consequences, if we act boldly, decisively and quickly.

However, despite a growing number ofhonorable exceptions, too manyof the world''s leaders are still best described in the words Winston Churchillapplied to those who ignored Adolf Hitler''s threat: "They go on in strangeparadox, decided only to be undecided, resolved to be irresolute, adamant fordrift, solid for fluidity, all powerful to be impotent."

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So today, we dumped another 70 million tons ofglobal-warming pollution into the thin shell of atmosphere surrounding ourplanet, as if it were an open sewer. And tomorrow, we will dump a slightlylarger amount, with the cumulative concentrations now trapping more and moreheat from the sun.