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- 这个概念是她的理论的核心。
This concept is at the very core of her theory.
- 他对我指的是什么没有一点儿概念。
He didn't have a slightest notion of what I meant.
- 掌握无限空间的概念是很难的。
It is difficult to grasp the concept of infinite space.
- 这两个概念之间有何联系?
What is the connection between the two ideas?
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