One of the clichés of pair programming is that if you're doing this method right, your screen should be covered with greasy finger-marks by the end of the day.

结对编程的特征之一就是，如果你正确地使用了这种方法，那么在一天结束的时候，你的屏幕上应该会沾满油腻的手指印。

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“Sheryl always believed that if there were thirty things on her to-do list at the beginning of the day, there would be thirty check marks at the end of the day,” Summers says.

谢丽尔总是认为，如果在一天的开始她的工作清单上有30件要做的事，那么在这一天的结束她的清单上也要有30个勾号。

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Monday marks world population day, as the UN population Fund says the world's population may reach 7 billion by the end of October.

星期一是世界人口日，联合国人口基金会表示，到10月份，世界人口可能达70亿。

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