noun🔗Share拱心石，关键。 The top stone of an arch."The builder carefully placed the keystone at the very top of the arch, locking all the other stones in place. "建筑工人小心翼翼地将拱心石放置在拱门的最顶端，这块关键的石头将其他所有的石块都牢牢地固定住了。architecturepartbuildingstructureChat with AIVocabulary GamePractice Reading
noun🔗Share关键，拱心石，基石。 Something on which other things depend for support."The team's success was built on communication; clear communication was the keystone. "团队的成功建立在沟通之上；清晰的沟通是关键所在。structurearchitecturesystemorganizationChat with AIVocabulary GamePractice Reading
noun🔗Share宾夕法尼亚州居民，宾州人。 A native or resident of the American state of Pennsylvania."My grandmother is a proud keystone who grew up on a farm in Lancaster County. "我的祖母是一位自豪的宾州人，在兰开斯特县的一个农场长大。personstateplaceChat with AIVocabulary GamePractice Reading
noun🔗Share加倍定价，百分之百的利润。 (retail) A retail price that is double the cost price; a markup of 100%."The store uses a keystone pricing strategy, so they sell shirts that cost them $10 for $20. "这家店使用加倍定价策略，所以进价10美元的衬衫，他们卖20美元。businesscommercefinanceeconomyvalueChat with AIVocabulary GamePractice Reading
noun🔗Share二游搭档，中坚组合。 The combination of the shortstop and second baseman."The team's keystone was crucial to their success in turning double plays. "这支球队的二游搭档对他们成功完成双杀至关重要。sportpositiongroupChat with AIVocabulary GamePractice Reading
verb🔗Share梯形失真，使...成梯形。 To distort (an image) by projecting it onto a surface at an angle, which for example causes a square to look like a trapezoid."Because the projector was positioned too low, it keystoned the presentation, making the top of the screen image narrower than the bottom. "由于投影仪放得太低，它使演示文稿的画面产生了梯形失真，导致屏幕顶部的图像比底部窄。technologycomputingmediaappearanceChat with AIVocabulary GamePractice Reading
verb🔗Share加倍定价，翻倍定价。 (retail) To double the cost price in order to determine the retail price; to apply a markup of 100%."The store owner decided to keystone all of the imported toys, doubling their original cost before putting them on the shelves. "店主决定将所有进口玩具都加倍定价，在把它们摆上货架前，将原价翻了一番。businesscommerceeconomyfinanceChat with AIVocabulary GamePractice Reading
