Message exchange pattern: data services could be accessed via the four primary message exchange patterns - request/reply (tight SLA), request/reply (relaxed SLA), fire/forget, and publish/subscribe.

消息交换模式：数据服务可以通过四种主要的消息交换模式被访问：请求-应答（严格SLA）、请求-应答（宽松SLA ），即发即弃和发布-订阅。

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There are several exemptions, including primary equity and bond issues, spot foreign-exchange deals and deals involving central clearing-houses.

税收也有一些豁免，包括主要股票和债券的发行、即期外汇交易以及涉及中央结算所的交易。

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Tourism has been ear-marked as the primary foreign exchange earner, with more visitors coming to Zanzibar each year.

随着每年越来越多的游客来到这里，旅游业已经被认定为第一重要的争取外汇的行业。

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Reopening the NYSE floor is critical for U.S. stock markets because of the NYSE's role as the primary exchange for many blue-chip listings.

WSJ: Questions Cloud Market Reopening

In the most recent ProShares filing, however, the trust notes that NYSE Arca, a trading venue of NYSE Euronext ( NYX) and the primary exchange for the vast majority of U.S.-listed ETPs, would be the venue of choice.

FORBES: ProShares Considers Listing Products with BATS

One way to get on a Englishman's wick is to offer a piffling 560 pence per share for the London Stock Exchange, the primary stock exchange in the U.K. and the largest in Europe.

FORBES: Magazine Article