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

• 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。
• It can obtain these parameters from Keystone, as well.
  也可以从Keystone中获得这些参数。
• 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）。
• 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。
• 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。
• 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。
• 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。
• 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。
• 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。
• 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。