斯诺登曝美国国家安全局曾密集攻击清华大学
<p></p><p><span word="People">People</span> <span word="walk">walk</span> <span word="in">in</span> <span word="front">front</span> <span word="of">of</span> <span word="a">a</span> <span word="historic">historic</span> <span word="gate">gate</span> <span word="in">in</span> <span word="Tsinghua">Tsinghua</span> <span word="University">University</span>, <span word="target">target</span> <span word="of">of</span> <span word="hacking">hacking</span> <span word="by">by</span> <span word="the">the</span> <span word="US">US</span> <span word="National">National</span> <span word="Security">Security</span> <span word="Agency">Agency</span>.</p>
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