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

• 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。
• 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。
• A keystone endpoint accepts two types of credentials: a token or a user name and password.
  keystone端点接受两种类型的凭据：令牌，或者用户名和密码。
• The keystone of this paper was to establish and calibrate and validate these four new modules.
  本文的研究重点是建立和验证新增的四个模块。
• That is the ideal condition that I need, its keystone lies in the experience.
  这才是我想要的理想状态，它的重点是一种体验。
• 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。
• 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。
• Based on it, compared with overseas researchful status of MICE tourism, the paper further discusses the intending researchful keystone and direction of MICE tourism.
  在此基础上，对比国外会展旅游研究状况，进而探讨了会展旅游未来的研究重点和方向。
• A pointed arch; usually has a joint ( instead of a keystone) at the apex.
  一种尖角拱；在顶点通常有一个接合点（而不是拱心石）。