求翻译：但是他们在美国没有亲戚，不能申请办理出国签证，你能否给他们发几份邀请函帮助他们办理出国签证，我不知道这个请求会不会给你带来困扰，结果如何我们都非常感谢你是什么意思？

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But they are in the United States do not have relatives, and you cannot apply for visas to go abroad, you can send them a copy of the invitation to apply for visas to go abroad, I do not know how this request will not be brought to you by, and what was the result we are all very grateful to you

But they do not have the relative in US, cannot apply to handle the study abroad visa, whether do you send several invitation letters to them to help them to handle the study abroad visa, I did not know this request can bring the puzzle to you, how result we all extremely thanks you

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