Guarantee levels: Tribes supports 3 levels of message delivery guarantee (NO_ACK, ACK, and SYNC_ACK).

有保证的消息传递：保证级别：Tribes支持3个级别的消息传递保证(NO_ACK、ACK和SYNC_ACK)。

youdao

Per message delivery semantics: These semantics allow for each message to be delivered differently as well as use a different guarantee level per message.

每消息传递语义：这些语义允许被传递的每个消息都是不同的，而且每个消息使用不同的保证级别。

youdao

Another advantage of synchronous messaging is that it's possible to guarantee delivery of the message.

同步消息传递的另一个优点是能够保证消息的提交。

youdao