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		       			"We have now just enshrined, the core principle that everybody should have some basic security when it comesto their health care."
		       					       					        			
		       					       			 VOA: standard.2010.03.23 
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	       				So this is a good thing and principle for security.
 
 所以这是个好事情,为了安全的原理。
 
 哈佛公开课 - 计算机科学课程节选 
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	       				So this is a good thing and principle for security.
 
 所以这是个好事情,为了安全的原理。
 
 哈佛公开课 - 计算机科学课程节选