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By David McAlary Washington 11 May 2006 Scientists have developed a cheap, rapid test to determine who has trachoma, the leading infectious cause of blindness in poor countries. The researchers say th
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孙子曰：兵者，国之大事，死生之地，存亡之道，不可不察也。 Sun Tzu said: The art of war is of vital importance to the State. It is a matter of life and death, a road either to safety or to ruin. Hence it is a subject of inqu
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