The WS-Transaction specification describes two coordination types, one called atomic transaction (at) and the other called business activity (BA).

WS - transaction规范描述了两种协调类型，一种是原子事务(atomic transaction, at)，另一种是业务活动(business activity, BA)。

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After processing the status response to the Commit (from the Atomic transactions section, Step 11), the business task then registers with the business activity.

业务任务向业务活动注册在处理完对Commit(来自原子事务部分，第11步)的状态响应之后，业务任务接下来就向业务活动注册。

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A transaction is a unit of activity within which multiple operations on data can be made atomic (indivisible), such that exactly all or none of the actions are made permanent.

事务是一个活动单元，其中数据的多个操作可以被原子化(不可分)，精确地说就是所有的活动都是永久的，或者没有一个活动永久的。

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