Drop-down menus display one option, while typically a small arrow to the right of the box invites you to click and bring more options into view.是什么意思_Drop-down menus display one option, while typically a small arrow to the right of the box invites you to click and bring more options into view.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句