Transaction layer - provides the communication tools which allow peer entities in two machines operating in the transaction sublayer to communicate and associate multiple operations as parts of a single transaction.

• 事务处理层 -- 提供允许运行在事务处理子层的两台计算机中的对等实体进行通信并将多个操作组合在一起作为单个事务的各部分的通信工具。