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Un libro es una ventana abierta a la imaginación y al conocimiento.
The concept of a legal right is a complex one, involving not only the existence of a rule but also the existence of a remedy.
材料中拓扑和对称性之间的相互作用可以导致意想不到且令人兴奋的物理现象。
To realize one’s nature perfectly---that is what each of us is here for.