| 单词 | keystone |
| 释义 | keystone (once / 5021 pages) n In a curved stone archway, the keystone is the one at the very center of the top. The keystone is the most important stone, and that's why this word is also used figuratively to mean the most important part of anything. A stone arch or vault gains its stability from the placement of the keystone, which is often the last one placed. From this architectural meaning, keystone also gained the figurative meaning of "central or most important part," or "the one thing upon which everything else depends." Like an actual stone keystone, this type lends stability: "The right to free speech is the keystone of all American rights." WORD FAMILYkeystone: keystones USAGE EXAMPLESIn 1985, two people died at Keystone Resort after the welding on the large wheel used to pull the cable failed. Seattle Times(Jan 01, 2017) Obama first advanced the idea of a climate test — whether new infrastructure is consistent, or not, with a low-carbon future — for the Keystone XL pipeline. Seattle Times(Dec 30, 2016) The congressman supports the Keystone XL pipeline and and supported measures to remove protections of endangered species, while opposing legislation to regulate fracking. The Guardian(Dec 15, 2016) 1n the central building block at the top of an arch or vault Syn|Hypo|Hyper headstone, key coign, coigne, quoin the keystone of an arch building block a block of material used in construction work 2n a central cohesive source of support and stability the keystone of campaign reform was the ban on soft money Syn|Hyper anchor, backbone, linchpin, lynchpin, mainstay support something providing immaterial assistance to a person or cause or interest |
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