恐怕我不确定你的问题是什么意思，虽然我认为部分原因是我用机器翻译来阅读你的问题。能否请你分享一张截图或更详细地描述一下？

例如，复制多个网格的变形键并将其粘贴到其他动画中应该是可以的。如果你想复制的不是变形键，而是顶点位置，请注意，所选顶点的数量必须匹配才能粘贴。如果所选顶点的数量匹配，即使选择了多个网格附件，顶点位置也可以粘贴。我假设你要做的事不属于这些，但我不太清楚那是什么，所以如果你能详细说明，我将非常感激。

I'm afraid I'm not sure what you mean by the question, although I think it is partly because I read your question using machine translation. Could you please share a screenshot or describe in more detail?

For example, copying deform keys of multiple meshes and pasting them to other animations should be possible. If what you want to copy is vertex positions, note that the number of selected vertices must match in order to paste. If the number of selected vertices matches, the vertex position can be pasted even if multiple mesh attachments are selected. I assume that what you are trying to do is something that does not fall into these, but I am not quite sure what that is, so I would appreciate it if you could elaborate.

谢谢你分享的截图! 我相信我明白了这个问题。
Thank you for sharing the screenshot! I believe I understand the issue.

为了让这个问题更容易理解，我上传了一段视频，展示了使用Spineboy的两种不同操作。:
To make the issue easier to understand, I have uploaded a video showing two different operations using Spineboy:

在这个视频中，我先对所有网格附件的变形进行了抠像，然后按Ctrl+C，移动到另一帧，再按Ctrl+V。在按下Ctrl+C后，你会发现视口中显示了 "Attachment transform copied "的信息。同时，当按下Ctrl+V时，会显示 "Attachment transform pasted"。正如这些信息所说，此时复制的是"一个"附件的旋转、平移和比例等变换。换句话说，当进行框选时，第一个被选中的附件的变换被复制，同样的局部旋转、平移、缩放和剪切被应用到其他附件。这就是为什么它会出错。
In this video, I keyed the deform of all mesh attachments first, then pressed Ctrl+C, moved to another frame, and then pressed Ctrl+V. After pressing Ctrl+C, you will notice that a message "Attachment transform copied" is displayed in the viewport. Also, when Ctrl+V is pressed, "Attachment transform pasted" is displayed. As these messages say, what is copied at this time is the transform such as rotation, translation, and scale of "an" attachment. In other words, when the box selection is made and made a copy, the transform of the first attachment selected is copied, and the local rotation, translate, scale, and shear are applied to the other attachments. That is why it is going wrong.

要实现你想做的事情，只需在Dopesheet视图中选择变形键并进行复制和粘贴，正如我在视频后半部分所做的那样。
To achieve what you want to do, simply select the deform keys in the Dopesheet view and do a copy and paste, as I do in the second half of the video.

以上希望能为您提供参考。
I hope this will help you.