这里还可以使用分布式单点登录协议，以使帐户管理中的高开销部分集中到一个点上。
Distributed single sign-on protocols also play a part here, enabling the expensive part of account management to be concentrated at one point.
难题在于以单个分布式事务怎样在ERP和CRM数据库中完成两个帐户的创建。
The challenge is on how to complete the creation of the two accounts in the ERP and the CRM databases as a single distributed transaction.
Web站点的访问者开了一个新的帐户，在此之后必须在两个不同的分布式旧系统中创建：用于帐户管理的ERP数据库和用于客户支持的CRM数据库。
A web site visitor opens a new account, which must then be created in two different distributed legacy systems: an ERP database for accounting, and a CRM database for customer support.
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