아치 꼭대기에 박는 쐐기 모양의 돌로, 전체 구조를 고정하는 역할을 함.
The central wedge-shaped stone at the summit of an arch, which locks all the other stones in position.
예문:
"The master builder carefully placed the keystone to ensure the stability of the stone bridge."
"Without the keystone, the entire archway would collapse under its own weight."
전체 시스템이나 논리가 의존하는 가장 중요한 기본 원리나 핵심 부분.
The fundamental principle, part, or policy on which a whole system or argument depends.
예문:
"Education is often cited as the keystone of a prosperous and equitable society."
"The right to privacy is the keystone of the legal argument for individual liberty."
"This new evidence became the keystone of the detective's theory about the crime."
야구에서 2루 또는 2루 주변 지역을 가리키는 용어.
A term used in baseball to refer to second base or the area surrounding it.
예문:
"The shortstop and second baseman are known as the keystone combination for their defensive coordination."
"The runner was caught stealing as he made a desperate slide toward the keystone."