计算机现在可以像人一样确实的分辨事物的种类。
A computer can now recognise classes of things as accurately as a person can.
本题论定义了世界中存在的事物的种类，并且可能处于某个应用领域。
Ontologies define the kind of things that exist in the world and , possibly, in an application domain.
没有其他明显种类的事物，可能会引起这样的记号。
There's no obvious sort of other thing that could cause this.
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