keystone

英 [ˈkiːstəʊn]

美 [ˈkiːstoʊn]

n.  拱顶石; (计划、论据的)主旨，基础

复数：keystones　

IELTS

BNC.21380 / COCA.17516

牛津词典

noun

• 拱顶石
  the central stone at the top of an arch that keeps all the other stones in position
• （计划、论据的）主旨，基础
  the most important part of a plan or argument that the other parts depend on

柯林斯词典

• 拱顶石
  Akeystoneis a stone at the top of an arch, which keeps the other stones in place by its weight and position.
• N-COUNT （政策、体系或进程的）基础，主旨
  Akeystone ofa policy, system, or process is an important part of it, which is the basis for later developments.
  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。

英英释义

noun

• the central building block at the top of an arch or vault
  Synonym:keyheadstone
• a central cohesive source of support and stability
  1. faith is his anchor
  2. the keystone of campaign reform was the ban on soft money
  3. he is the linchpin of this firm
  Synonym:anchormainstaybackbonelinchpinlynchpin

双语例句

• How to construct terrain models and their texture is a research keystone.
  方便、有效地建立地形模型及其纹理是地形景观研究的重点。
• Nowadays, biosorbents become the hotspot and keystone of the researches on treating heavy metals and POPs.
  目前，生物吸附剂已成为处理重金属和持久性有机污染物研究的热点和重点。
• One additional service of Keystone is the service catalog used for end point discovery.
  Keystone的一个附加服务是用于端点发现的服务目录。
• We hope to see you become a keystone of the intellectual community.
  我们希望看到你们成为知识界的一块拱顶石。
• In this paper, the general situation of mountain ecosystem was briefly introduced and the effects of keystone populations on the degraded ecosystem were discussed.
  简要介绍了岷江上游山地生态系统的概况，讨论了关键种群在退化生态系统研究中的作用和意义。
• 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。
• Annotation is the keystone of the knowledge representation of any natural language processing ( NLP) research.
  标注集是任何自然语言处理研究中的知识表达基础。
• Industry is the soul of business and the keystone of prosperity.
  勤劳是事业的灵魂和成功的基石。
• By this problem of the counteracted system, the keystone on jamming counteraction is analyzed and the primary factors which affect the counteracted capability are discussed.
  针对对消系统面临的这一问题，分析了干扰对消的基本原理，并对影响对消性能的主要因素进行了深入探讨。
• Administrative functions in Keystone define users and projects and assign the appropriate authorization.
  Keystone中的管理功能定义了用户和项目，并分配了适当的授权。