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

• 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。
• Each Keystone function supports back-end plug-ins for integration into heterogeneous environments and to expose diverse functionality.
  每个Keystone功能都支持用于集成到异构环境并展示不同功能的后端插件。
• 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。
• Currently, revitalizing the commerce railway system has been included in the program of'urban rebirth'as a keystone.
  目前，重振铁路商业已列入“都市再生”计划，并作为一个重点。
• 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 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。
• Presently the study keystone of the technique is how to improve its accuracy and sensitiveness to measure.
  目前对该技术的研究重点是如何提高它的测试准确性和灵敏度。
• 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）。
• 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。