语言表现形式是无穷无尽的。因而对与语言行为的化石证据——即和语法句法有关的基因——的搜寻，足够科学家们忙上几十年了。
Language is nearly endless in its forms. So the search for its behavioral fossils-genes associated with grammar and syntax-should keep scientists busy for decades to come.
按照表现形式的不同，可以分为名声证据、意见证据和先前行为证据。
According the forms of expression, the evidences can be classified into reputation evidence, opinion evidence as well as concrete behavior evidence.
证据有很多种表现形式，如功能点数据，系统文档，和开发人员、用户的交谈信息，和执行最初估算的人的面谈信息等。
Evidence can take many different forms, the function point count, system documentation, conversations with developers and users, and interviews with individuals that conducted the original count.
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