有些屏幕只有取消按钮，而没有提示如何进一步操作。

Some screens only have cancel buttons, with no instructions on how to move forward.

youdao

这样，解析是在单独的线程中运行的，对话框中还显示了一个取消按钮。

This way, the parsing runs in a different thread while the dialog is shown with a cancel button.

youdao

我觉得这不仅是可以接受的，也很必要为比如下载文件的过程加入取消按钮。

I presume it's not only acceptable, but also required to have a cancel button for things like downloading files?

youdao