keystone

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Therefore, XForms can become the keystone of a highly productive declarative and XML-centric development environment.
因此，XForms 可能成爲(wèi)高生産率的聲明性的、以 XML 爲(wèi)中心的開發(fā)環(huán)境的基礎(chǔ)。
The company promised reductions in rates of more than 20 percent, but after submitting our employees’ personal data, the rates turned out to be almost identical to what we were paying Keystone.
這個(gè)公司所承諾的是降低至少20%的費(fèi)用，但是在提交每名員工的個(gè)人資料以後，結(jié)果相比於我們所支付的“凱斯通”費(fèi)用基本相同。
Vogels (2003) claimed that the "XML document is the Web service's keystone because it contains all the application-specific information that a service consumer sends to the service for processing."
Vogels (2003) 聲稱 XML 文檔是 Web 服務(wù)的基礎(chǔ)，因爲(wèi)它包含服務(wù)客戶發(fā)送給服務(wù)処理的所有特定於應(yīng)用程序的信息。

Just as a keystone holds together a stone arch, Pennsylvania was seen as holding together the young American republic.
The proposed Keystone XL pipeline would carry heavier crude oil produced from tar sands in Canada.
Pennsylvania's nickname is the Keystone State.

Thor's back-office organization has helped Keystone boost its once-struggling quality and service operation and spare-parts distribution.
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(STONE) the middle stone in the top of an arch that has a special shape and holds all the other stones in position
(IMPORTANT PART) the most important part of a plan, idea, etc. on which everything else depends

A keystone of a policy, system, or process is an important part of it, which is the basis for later developments.
A keystone is a stone at the top of an arch, which keeps the other stones in place by its weight and position.