This all fits together logically, because the Undo function is unavailable if a modal dialog box is up, but is still usable with modeless ones.是什么意思_This all fits together logically, because the Undo function is unavailable if a modal dialog box is up, but is still usable with modeless ones.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句