That is why the Outbox Symptom happens randomly.
不稳定性导致症状出现的随机性。

Outbox transmissions retry delay cannot be empty.
发件箱的传输重试延迟不能为空。

These messages have been left in the outbox folder.
这些消息仍留在发件箱文件夹中

Puts message in the outbox to be sent at a later time.
将邮件放入发件箱中, 以后再发送。

I've seen the champ outbox better fighters than this one.
我曾看到过这位卫冕者击败过比这位更优秀的一些拳击手。

Others felt that the Olympic champion from Cuba might be able to outbox and outsmart the elder Klitschko brother.
有人觉得古巴的奥运会冠军可能爆冷，击败大克里琴科。