The MQTT client has much simpler semantics than JMS because there is no concept of sessions, consumers, producers, or application control of transactions.

MQTT客户机的语义比JMS简单很多，因为没有会话、用户、生产者或事务处理的应用程序控制这样的概念。

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However, it may be necessary at times to have further control of transactions.

然而，有时对事务进行进一步的控制也是很必要的。

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Provide a mechanism to control transactions on a task-by-task basis for each activity.

提供一种机制以逐个任务为基础控制每个活动的事务。

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The fact that certain transactions are hard to control does not mean that they should be made legal.

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It also gives the company more control over transactions.

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The CFIUS gives the government the right to review transactions that could give foreign persons control over U.S. companies.

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