其连锁店网站提供了一个简单易用的与客户代表直接对话的程序，同时也通过电话和电子邮件提供服务。
The chain's website offers an easy-to-use live chat online with a customer service representative, as well as help via phone and e-mail.
类似的大多数站点同时也提供应用程序接口(APIs)，支持第三方编写能与站点服务器进行直接、安全及高效对话的软件。
Most sites like these also offer application programmer interfaces (APIs) which let third parties write software that communicates directly, securely and efficiently with the site's servers.
这种相互间来回的会话可能会发生几次，用户可能会下几次订单，或者说，用户与Web服务应用程序间发起多次对话。
This back and forth conversation might happen several times, and the user might invoke several buy orders, or, in other words, might invoke several conversations with the web service application.
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