Bookends
n. 挡书板；书夹；书挡（bookend的复数形式）
🗣️ 情景例句
Well, Mrs. Herrera,
好，Herrera太太
The snow will soon be deep enough to ski on.
雪将会很快就积到可以滑的深度了。
The firm closed down because there wasn't enough demand for its product.
工厂关门了，因为产品供过于求。