ousia

例句：

1. 1. The ousia of a thing is its nature or quality.
   某物的本质是其性质或质量。
2. 2.The ousia of a person is their personality and character.
   某人的本质是他们的个性和性格。
3. 3. The ousia of a theory is the explanation it provides for phenomena.
   理论的本质是对现象的解释。