adj.可表现的，可榨出的
This is not expressible as a first - order predicate calculus property.
这就是一个一阶谓词演算不可表述的属性.
The other is tacit knowledge which is not easily visible and expressible.
而另一种知识是隐性知识,不容易看见和表达,它万全是个人知识,难于形式化.
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