当你拿到就业许可证以后，我们再办理你的邀请函。

After you have your Employment License, you can transact your Invitation Letter.

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最后，我们又证得了几族李雅普·诺夫泛函的存在性。

Finally, we prove the existence of several families of Lyapunov functionals.

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随函我扶上信用证的副本。

I enclose herewith copy of the Letter of Credit.

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随函我扶上信用证的副本。

I enclose herewith copy of the Letter of Credit.

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