洛阳纸贵的英文：
[Literal Meaning]
Luoyang/paper/expensive
The price of printing paper in Luoyang rises.

[解释]
著作有价值，流传广。

[Explanation]
overwhelming popularity of a new book (causing shortage of printing paper)

[例子]
《指环王》第一部出版以后，一时洛阳纸贵，人们纷纷到书店去购买。

[Example]
The first volume of The Lord of Ring came out and won overwhelming popularity, and people swarmed into bookstores to buy them.