There is no universal pattern in representing process planning knowledge and the pattern must be chosen according to the feature of various knowledge.
工艺设计知识的表达不存在普遍通用的表达模式，而必须根据各类工艺知识的结构特点选择适合的知识表达方法。
Human face is the universal pattern of human being's vision. The visual information that face represents has important effect and meaning in society intercourse.
人脸是人类视觉中最为普遍的模式，人的面部所表现的视觉信息在社会交流和交往中有着重要的作用和意义。
Even if a pattern of behaviour is almost universal, we can't know in advance if it is a law of nature we cannot change or simply a remnant of our primitive past that we can and should modify.
即使一种行为模式是近乎普世的，我们也无法预先知道它究竟是一个我们不能改变的自然法则，还是只是一种我们能够并且应该改变的原始陋习。
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