You must become our permanent customers as long as we have once cooperation.

我们只要有一次合作，您一定成为我永久的客户。

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We firmly believe: Once cooperation will make us a forever friend. We warmly welcome all friends from all over the world to come.

公司坚信：相信一次的合作将是永远的朋友，热忱欢迎新老客户莅临指导！

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"Even a few cheats undermine cooperation," Johnson says, because once people realize that they are paying for the same thing others are enjoying free, they become less willing to cooperate.

“即使是很少几个骗子，就能破坏人们的合作关系，”约翰逊说，因为一旦人们意识到，与他们同样的人，正在享受免费的好处，他们就变得不太愿意合作了。

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The notorious "wall" that once prevented cooperation between intelligence agencies and their law enforcement counterparts has been dismantled.

CENTERFORSECURITYPOLICY: Hail to the Chiefs

Trade binds individuals in countries together for it once again fostering economic cooperation, and for doing so, it makes war far less likely.

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While their will likely be a lot of nodding, smiling and feigned interest in global cooperation, once the meeting ends, the leaders will probably just return to their respective countries and forge ahead with whatever plans they had previously anyway.

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