How to implement cross-page text selection on mac

scorz

It is known that on Windows, when using zotero to select text translation, the alt key can be used for cross-page selection. So how can I achieve this on a mac？
已知Windows 上使用 zotero 上选取文本翻译，跨页选择时可以利用 alt 键完成。那么我在 mac 上该如何实现？