我曾撰文谈到过一系列与学习有关的习惯，但有一个方面是从来没有涉及到的，这就是集中注意力的问题，个中原因可能是本人觉得这是最难于养成的习惯之一吧。
I've written about a range of habits related to learning, but one I have not yet covered is concentration - perhaps because I find it among the hardest of habits to truly master.
几个月前我曾就苹果(Apple)的环境政策撰文，该文刊载于Macworld杂志，其中一段引述如下。
A quote from a Macworld article I wrote a few months ago on Apple's environmental policies.
这一次，我是为了生命撰文，这些逝去的生命在过去十年的大部分时间里，曾或多或少的使我感知周围世界的方式发生了极大——或许是根本性——的改变。
Doing this for a living, on and off, for the better part of a decade, has greatly-perhaps fundamentally-changed how I perceive the world around me.
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