出自唐代杜甫的《观公孙大娘弟子舞剑器行》中出现的名词。
他写了一份报告，要求提供100把剑，600支枪，地雷投掷器和炸弹。
He wrote a report in which he asked for 100 swords, 600 guns, mine throwers and bombs.
然而遗憾的是，其失败模型是把双刃剑，它并不会抛出应用崩溃异常，而是将绑定错误直接写到追踪监听器当中。
Unfortunately its failure model is a double-edged sword. Instead of throwing application-crashing exceptions, binding errors are quietly written to the trace listener.
那就请chkdsk和defrag双剑合壁，为你的硬盘驱动器做个检查吧，并且，经碎片整理之后，文档能更好的保存。
Use the dynamic duo of chkdsk and defrag to check your hard disks for errors and defragment files to keep your storage in good shape.
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