"stone in the middle of an arch, which holds up the others," 1630s, from key (n.1) in figurative sense of "that which holds together other parts" + stone. Figurative sense is from 1640s. Pennsylvania was called the Keystone State because of its position (geographical and political) in the original American confederation, between northern states and southern ones. Keystone cops were the bumbling police in the slapstick silent movies produced by Keystone Company, formed by Canadian-born U.S. film director Mack Sennett (1884-1960) in 1912.
实用例句
1. Keeping inflation low is the keystone of their economic policy.
将通货膨胀率保持在较低水平是他们经济政策的主旨。来自柯林斯例句
2. Social justice is the keystone of their political program.
社会公平是他们政治纲领的基本原则.来自辞典例句
3. Quantitative measurements of one sort or another serve as the keystone of engineering practice.
定量测定一种或多种成分是环境工程中的重要项目.来自辞典例句
4. The keystone to any marriage is one word: " WE ".
任何婚姻的基石只有两个字: “ 我们 ”.来自互联网
5. Advancing suburban assurance is the difficulty and keystone of domestic insurance enterprise.
