Graeber gradually learned how to strip imagination from fact in telephone reports, and developed clever techniques for checking and double checking the stories of UFO witnesses.

Graeber逐渐学会如何从电话报告中的事实与臆想区分开来，并找到巧妙的方法检测和复查不明飞行物目击者的叙述。

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A configuration issue is usually the root cause, so double-checking that your client and server configurations correctly match can weed out a lot of problems.

配置问题通常是问题的根源，因此反复检查您的客户端和服务器配置是否匹配能够消除大量问题。

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Recent break-ins at Facebook and Apple have weary IT teams double checking networks and systems for security holes.

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Instead, he spends years, decades even, checking and double checking his evidence.

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Mr McCarthy went to the bingo hall where his wife was working and went on stage to surprise her after double checking the numbers.

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