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。
• 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）。
• One of keystone's primary functions is to serve as a service catalog.
  keystone的主要功能之一就是充当服务目录。
• 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。
• 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。
• As the classic adjacent exits and entrances, weaving areas are the keystone and difficulty of traffic study.
  交织区作为典型的相邻出入口，是交通领域研究的重点和难点。
• We recognize that keystone has been caught up in political gridlock in this country.
  我们知道Keystone项目已在美国陷入了政治僵局。
• HTTPS is the keystone of Internet security and privacy.
  HTTPS现在是互联网安全和隐私保护的基石。
• It takes the moral selection as a core and the innovative ability& the development of practical ability as a keystone.
  选择教育以道德选择为核心，以创新精神和实践能力的培养为重点，而人的全面和谐发展是选择教育的最根本理念。
• Japan's co-operation was the keystone in developing the regional agreement.
  日本的合作是发展地区和睦的基础。