Transport reliability has similar performance concerns but the interesting benefit is once-and-only-once delivery.
传输可靠性有类似的性能问题，但是其令人感兴趣的好处是一次且仅一次传送。
It also guarantees delivery of a message (at least once).
它还保证消息的交付(至少一次)。
We'll make delivery at once if I receive your order.
收到定单后，我们将马上交货。
So, you must delivery at once, otherwise, we have to cancel the order but order in other place.
因此，贵方必须立即发货，否则我们将被迫取消订单，到另处订货。
Once the delivery method is defined, you can encode the different rate grids.
一旦交付方法的定义是，您可以编码不同的网格率。
We'll arrange the delivery of the correct goods at once.
我们将马上安排发运你们所订购的货物。
We'll arrange the delivery of the correct goods at once.
我们将马上安排发运你们所订购的货物。
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