英语单词：worsen
<p>今天我们要学的词是 <span word="worsen">worsen</span>.</p><p><span word="Worsen">Worsen</span> 动词，意思是恶化。网络安全专家预计，<span word="Cyberattacks">Cyberattacks</span> <span word="will">will</span> <span word="only">only</span> <span word="worsen">worsen</span> <span word="in">in</span> 2015 <span word="as">as</span> <span word="hackers">hackers</span> <span word="use">use</span> <span word="more">more</span> <span word="advanced">advanced</span> <span word="techniques">techniques</span> <span word="to">to</span> <span word="infiltrate">infiltrate</span> <span word="networks">networks</span>. 黑客不断使用更先进的渗透手段，2015年网络攻击会进一步恶化。在最新民调中，53 <span word="percent">percent</span> <span word="of">of</span> <span word="Americans">Americans</span> <span word="said">said</span> <span word="race">race</span> <span word="relations">relations</span> <span word="had">had</span> <span word="worsened">worsened</span> <span word="since">since</span> <span word="President">President</span> <span word="Obama">Obama</span> <span word="took">took</span> <span word="office">office</span>. 百分之53的受访者认为，奥巴马总统上台后的美国种族关系出现了恶化。</p>
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