PatrickRen commented on a change in pull request #11151:
[FLINK-16128][docs]Translate "Google Cloud PubSub" page into Chinese
URL: https://github.com/apache/flink/pull/11151#discussion_r383105282
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File path: docs/dev/connectors/pubsub.zh.md
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@@ -143,22 +135,22 @@ env.addSource(pubsubSource)
</div>
</div>
-### Atleast once guarantee
+### 精确一次语义保证
#### SourceFunction
-There are several reasons why a message might be send multiple times, such as
failure scenarios on Google PubSub's side.
+有很多原因导致会一个信息会被多次发出，例如 Google PubSub 的故障。
-Another reason is when the acknowledgement deadline has passed. This is the
time between receiving the message and between acknowledging the message. The
PubSubSource will only acknowledge a message on successful checkpoints to
guarantee Atleast-Once. This does mean if the time between successful
checkpoints is larger than the acknowledgment deadline of your subscription
messages will most likely be processed multiple times.
+另一个可能的原因是超过了确认的截止时间。这是收到信息的间隔和信息确认的间隔。PubSubSource
只有在信息被成功快照之后才会确认以保证至少一次的语义。这意味着，如果你的快照间隔大于信息确认的截止时间，那么你订阅的信息很有可能会被多次处理。
Review comment:
I doubt that the second "between" is added by mistake in the original
English document:
> This is the time between receiving the message and <s>between</s>
acknowledging the message.
If so, the translation would be:
另一个可能的原因是超过了确认的截止时间，即收到与确认信息之间的时间间隔。
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