We pointed out that iterations reduce risk and avoid the problems inherent in an all-at-once delivery.

我们指出迭代可以减少风险并避免一次产生所有产物的与生俱来的问题。

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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。

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It also guarantees delivery of a message (at least once).

它还保证消息的交付(至少一次)。

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Unfortunately, all signs are that POTUS will once again delivery a laundry-list SOTU, leaving the larger TV audience alternately bored and mystified.

FORBES: What Should President Obama Say During His State Of The Union Address?

Once a delivery point becomes established it is expensive for users, such as grain dealers, to switch to a contract with a different delivery point.

ECONOMIST: Grains of truth

Once a store has taken delivery of an item, it owns it.

FORBES: Leaner Shelves, Leaner Profits?